I wonder if what Tim Hunt meant on the radio (was that the recorded message he left on his way to the airport?) was that he had problems with girls ("I did mean the part about having trouble with girls"). It doesn't mean there's anything wrong with girls, or that he is saying there is. It's humour directed at himself.
That's how I read it and I think his original joke was actually intended to be humour directed at himself as well. That is how it began - Let tell you about my trouble with girls. And his wife has said it reflects how they met. It wasn't just his age I was taking into account but his entire background.
Everything I've read suggest he's a great scientist, all round decent human being but a lousy comedian. As he was hired for his science ability I do think sacking him for his comedy skills is a bit out of order. And I think it's unfair because a lot of people commenting under news articles I think have more to argue with their husband than Tim Hunt who actually appears to have done his fair share to allow his wife to progress as a scientist.