The Answer is no.
From AMERICAN RELIGIOUS IDENTIFICATION SURVEY 2001
People with No religion Identified themselves as Democrats 30% of the time which is actually less than Baptist (39%), Catholics (36%)and Methodist (32%)
The thing is only 17% people in the No religion class identify themselves as Republicans with 43% Indenpendents and 10% None which shows me that yes in fact the hard core fundementalist are chasing/turning off people from the Republican party
I don't buy the fact that they are driving people off, but I do agree that they are myopic and sometimes damaging to the party as a whole.
The point I was trying to make matches what I see on the street. The poll indicated that more than 15% of the Dem's claimed no belief in God and only 3% of Repubs.
Not hard to understand and difficult to argue with, although it seems that people are.(go figure)