The different exam outcomes issue is complex. Back when I started university the received wisdom was that women were conscientious but dull 2.1 plodders and men either had the brilliance to get 1sts or were too busy doing other stuff (rugger, debating club etc) so got 3rds. My tutor (female prof) campaigned very hard for blind marking in my subject, and, guess what, the discrepancy in marks disappeared.
More recently there's been an argument that the new course-work oriented style of assessment favours girls, because they're conscientious whereas flaky, disorganised but intrinsically brilliant boys (seeing a common thread here, anyone?) do better with exam based systems where they can muck around for 2 1/2 terms then get down to business in the last few weeks in one concentrated push (disclaimer - this latter mode is actually my personality type too, and last time I checked, I was a woman).
Now I don't think that it's that boys are intellectually inferior to girls. I think that it may be an instance of gender stereotypes damaging men as well as women (a fact that any decent feminist I know acknowledges). Boys are socialised to mess around - boisterous behaviours dismissed as boys-will-be-boys, quiet behaviours criticised as girly. Then we wonder why they don't have the mental resources to knuckle down through several drafts of a piece of coursework, or plan their time. (Fwiw, as another example of gender stereotypes harming men, I'm doing a benefit gig this weekend for mental health provision among ex-servicemen and women - the suicide rate among soldiers who've seen front line service is enormous, because we have a macho culture that pushes the military as an exciting career option for boys, uses them as cannon fodder in ill-thought out, politically motivated wars of dubious legality, then offers them no support after leaving. I hope, by the way, that it's obvious that the target of my criticism is politicians and senior military strategists, not servicemen and women themselves, who do a difficult job requiring bravery I couldn't come close to).