Results don't surpise me. With my experience on various online forums and blogs. The internet form of media seems to draw more Liberal, secular, atheistic, type people. So I never take results from internet polls as a fair display of the actual results.
This isn't an excuse. But I have been involved on many forums and blogs, and a fair balance people on the web are secular, atheists.
If you take the results to the entire population, with different demographics, you would find alot different results, and atheism would be in the minority.
In America its 'bout 7-10% Atheist, and 85-90% who believe in a supreme deity. And 80-85% who label themselves Christian.