... a concept only the internet user does know pretty well ;-)
Isn't it hard to present yourself with a photo? Accepting the message that comes with your pic (there's always one, whether you want it or not)... yeah it's not easy to present oneself.
Do the profile pics tell the truth? Whatever they are, I think yes. They're revealing anyway about who you are. Or who you are not. //oO\\
But, hey, you might change your mind with this ad that I discovered on Mel' s Facebook page the other day! (thank you girl!) ... a profile pic might not reveal the truth at all ;-)