Same-Sex Education: Separate but Equal?

Does anyone think they would have learned better in a single-sex classroom? I am trying to keep an open mind, but this is disturbing to me. It seems it would be too easy for this to devolve into "separate but equal". A self- (or more realistically, parent-)selected group of students in a single-sex class could easily make a `better' class than the coed class. Even more basically, I take issue with the message this sends students, calling attention to their gender. It seems there are ways to take advantage of findings that boys and girls learn best with different techniques in some cases without resorting to this. What about students that don't fit the typical mold for boys or girls?

I have to wonder if this is growing out of the oft-expressed sentiment that boys are being `left behind' while girls are doing better in school. There is a lot of commotion that we must `fix' this problem, unlike back when it was the other way around, when there was consensus among many that it wasn't a problem that needed fixing.