Among high socioeconomic status families, the heritability tends to be high. Among low socioeconomic status families, it is significantly lower. Some studies have found the contrary to be true (for verbal ability): http://www.sciencedirect.com/science/article/pii/S0160289605000218

The US-EU GDP per capita difference probably stems largely from the fact that Americans work significantly more hours than Europeans. This is discussed here: http://crookedtimber.org/2010/08/21/eu-us-convergence/. Moreover, it is claimed in the comments there that the US advantage is mostly due to the large number of super-rich people in America, suggesting that the median American is not better off than the median Western European: "The US has the largest gap between its top earners and everyone else. The Netherlands actually surpasses the US for GDP per-capita of the bottom 99%, and the difference between Germany and the US narrows considerably."

Does this calculation take into account the fact that more babies are born in some months and not only because some months have several more days than others?

Fraternal twins are more similar in IQ to each other than ordinary siblings. This suggests that twins share an environment, either pre-natal or post-natal (or both), that tends to make them more similar to each other. I'm not sure if this effect persists to adulthood though. Some of it might be due to the Flynn effect.

Well, it does not seem to be an Islamic temple: there's an animal relief in the pillar depicted in the picture accompanying the Newsweek story. Isn't that sort of thing verboten in Islam?)

Please add a link to Scienceblogs GNXP to the side bar of this site. There used to be one. It's useful.

Finland and the Baltic states show an unusual amount of testosterone for Europe, and this shows up in measures like homicide, HIV, testicular cancer, digit ratio, and sperm quality. 
 
As regards HIV, it seems that Finland and Lithuania have prevalance rates similar to or lower than those of Western Europe, whereas Latvia, Estonia, and Russia have high rates. See this chart of reported new infections in the Eastern Baltic Sea area 1999-2004 (in the chart Suomi=Finland, Viro=Estonia, Liettua=Lithuania, Leningrad=Leningrad Oblast, Karjalan tasavalta=Republic of Karelia, Pietarin kaupunki=St. Petersburg).  
 
The most obvious demographic difference between Finland and Lithuania on the one hand, and Latvia and Estonia on the other, is that the latter have large Russian-speaking minorities (between a quarter and a third of the total populations), whereas the former don't. In Estonia, the worst hit area is the city of Narva, which is 94% Russian-speaking. So, one might conjecture that the high HIV rates of Estonia and Latvia are due to the presence of Russians, considering that Russia has a very high rate, too. It should be noted that apparently the majority of HIV carriers in this area are/were intravenous drug users. 
 
This is not to say that there could not be something to your theory about the Eastern Baltic Sea peoples, just that the HIV argument seems weak. As for Finns, heavy drinking, and homicide (as discussed by Sailer in the link), this study found a link between the high activity MAOA genotype and "alcohol-related impulsive and uncontrolled violence" in a sample of Finnish violent offenders.

I think eugenics went out of favor when the baby boomers started assuming power. Sweden, for example, had forced sterilisations until the 1970s. For the boomers everything associated with Nazism was bad, whereas their parents' generation shared some of the Nazis' views. While it was not fashionable to publicize eugenicist views after the WW2, it's not like people in the academy and elsewhere who had espoused such views for a long time suddenly stopped believing in them when Nazi atrocities became known.

of course, it does seem suspect that the african environment only subtracts 3 IQ points relative to the US black environment.. 
 
It is said in the abstract that the comparison is with UK norms, and as the average IQ of Britons is 2 points above that of Americans, wouldn't that mean that the African environment substracts 5 points compared to the African American environment?

The name itself "Swedish-speaking Finn" is recent political term co-incided by Finnish state bureaucrats. Some perceive it offensive, and prefer the traditional form "Finland-Swede" 
 
I'm pretty sure the term was actually introduced by Folktinget. At least that's the term they prefer. I think "Finland-Swede" was rejected because it is perceived as ungrammatical. 
 
There has been no attempt by the state to change the Finnish and Swedish words suomenruotsalaiset/finlandssvenskarna ("Swedes of Finland"), which have been used, I think, from the late 19th century, so the idea that the state has some agenda here sounds like so much paranoia.  
 
If there's some people who recently have been trying to portray the Swedish-speakers as more authentically Finnish, it's the moribund Swedish People's Party (SFP). In the last elections, SFP tried this in order to gain votes from Finnish-speakers--very laughably, as everyone knows the party has ever had only one political idea, the furtherance of the social and economic status of the Swedish-speakers. The current party leadership includes everything from typical market liberals to communists like Nils Torvalds (Linus's father).

Lander's a liberal spoofing his own tribe. 
 
That's what he says, but is he really? His mocking of "white people", while always good-humored, often seems to be about proving that lots of liberal positions are naive, hypocritical and/or motivated more by status competition and classism than any real concern for society. His perspective seems to be that of a disillusioned former "insider". How many "white people" read Sailer (and stay that way) anyway?