Well no one is stupid enough to reveal everything about themselves right at the very beginning, I don't even think that's possible. I mean the current girl that I liked since last year I knew her when she was in 9th grade and I was in 10th, we talked while walking home after school for about 4 months, the funny thing there is that we didn't say anytihng about our personal selves at all...not until last year anyways.
Even today we're still finding shit out, so that's why I say that even on a date, no way he's going to say everything, that alone makes me think that he would be all panicking on order to do that.