I've always been very lean and thin, and also tall ('lanky' I guess would describe it). So it's been nice to be hung, even more so than if I had a more bulked-up physique, maybe. Makes me feel less self-conscious about my un-muscled-up overall appearance. As to whether lanky frame=more likely to be hung, I have no idea -- but maybe on a leaner frame, even a modestly hung set of equipment, er, stands out more prominently to those observing it. And hence, maybe, the perception noted in this thread that lanky guys tend to be more hung. Who the hell knows?
