I've been more or less convinced for a while now that the ex-gay movement is a pipe dream, and the recent case of Ted Haggard has re-enforced that conclusion. If the kid's gay, he's pretty much going to be gay no matter what Dr. Dobson has to say about the subject.
At 13, the kid has a good long while before he has to worry too much about what his sexual orientation is. Myself, I suspect that he's just going through a phase. Despite what Dr. Dobson writes, not every shy kid who prefers reading to football is doomed to homosexuality.
I don't think that Dr. Dobson ever implied that being a nerd was doomed to a sexual perverts life.
Our son was and is an avid reader and walking dictionary, he five children, and is probably one of the most hetroxsexual adult man that you could find.