Alex, 
 
Fascinating material. Yet basically psychometricians have been trying to hammer home the message that education is determined by educability and not vice versa ever since ... the era of Cyril Burt and the London School. 
 
The question is: will the message EVER reach the mass media and the educated public in general? 
 
How many goddam meta-analyses and 50-year mass longitudinal studies and monozygotic twin studies will be needed before the egalitarians concede defeat? 
 
The staying power of ideology never fails to amaze. 
 
Cathal Copeland