I'm not sure what the point here is.
People have Biases? Obvious.
Atheists are as or more biased than religious practitioners? Not demonstrated.
And no, that word count is not a demonstration. I don't even know if he put that word search in ratio to the number of words in the books. But at any rate, I have doubts about the sufficiency of a strict series of words like that, particularly considering Ann Coulter's place. She is never anything other than certain when she speaks, she doesn't necessarily convey that by always using exact words like "certain" over and over again.