There is a same-sex boys school in my hometown, and I am renowned for being able to pick which guys went there, upon first meeting them. THAT'S how socially awkward they are. They also seem more immature than males who went to co-ed schools, and far more obsessed with sex? Honestly, I can pick them a mile away.
I went to an all girls school myself, and whilst I'm not socially awkward (well I don't think I am...I'm shy but I think that's different), I do feel *very* self-conscious etc around members of the opposite sex, and a few of my high school friends are the same. Upon saying that though, I LOVED going to an all girls high school, I never once wanted to attend a co-ed school. I wouldn't send my son to a same-sex school though .