At least according to most Americans. The 
full report of the Pew 
Religious Landscape Survey has some data not available on the website.  There is a question of the form: 
When it comes to questions of right and wrong, which of the following do you look to most for guidance?  I think the results will surprise....
      |   |     Religious teachings & beliefs  |     Philosophy & reason  |     Practical experience & common sense  |     Scientific Information  |     Don't know/Refused  |   
      | Evangelical |     52 |     4 |     39 |     2 |     3 |   
      | Mainline |     24 |     9 |     59 |     4 |     4 |   
      | Historically Black  |     43 |     4 |     47 |     3 |     3 |   
      | Catholic |     22 |     10 |     57 |     7 |     5 |   
      | Mormon |     58 |     4 |     33 |     2 |     3 |   
      | Orthodox |     25 |     11 |     52 |     8 |     5 |   
      | Jehovah's Witness  |     73 |     3 |     19 |     1 |     5 |   
      | Other Christian  |     19 |     25 |     42 |     7 |     4 |   
      | Jewish |     10 |     15 |     60 |     9 |     6 |   
      | Muslim |     33 |     10 |     41 |     14 |     2 |   
      | Buddhist |     4 |     27 |     51 |     12 |     5 |   
      | Hindu |     9 |     15 |     55 |     18 |     4 |   
      | Other Faiths  |     5 |     25 |     58 |     8 |     4 |   
      | Unaffiliated |     6 |     16 |     66 |     10 |     3 |   
America is the land of pragmatism I guess.
Addendum: I want to make clear that I'm not assuming a Blank Slate model where the sources of moral intuition or reason that people offer up is actually the real source, as opposed to a post facto confabulation.  The survey is simply interesting to me as a window into the public's own self-perception.
Labels: Religion