Alan Rodger Currie, the creator of Mode One, has stated several times, that he has never slept with a woman that is smaller than him - ever. And he weighs 240lbs. So, yeah.
David X is a fun guy. In the way Michael Jackson or Ron Paul are fun. You know, weird, but sort of likable in that "he's a crazy person" sort of way. He's had sex with over 400 people who have vaginas. I'm loath to call them "women" as "woman" generally comes with some projection of femininity, which is not exactly what the ground up old 50+ year old biker chicks that David X plows, are.
In essence, yes, this can work. On older/insanely fat chicks. If you look at Alan and think this BBW fest he went to looks up your alley, then yes, you will get a small percentage of takers. Try this on even a homely girl, and expect a %100 fail rate.