It's so true.
I've particularly noticed this in internet forums, actually - the ones I fled from to come here in fact. You have a bunch of guys online talking about hot chicks and how they'd like to bone them, or not, as the case may be. Someone posts a picture of a perfectly good-looking young women, and all these guys come out of the woodwork and criticize her looks because she's not perfect enough. "Nose too long," "thighs too fat," "fugly," "what's with the mole on her chest," etc. etc. Yet, when you see the thread where they post pictures of themselves, guess what? They're all a bunch of chubby, mundane-looking dorks with skin problems! Who the hell do they think they are?