According tothis men mostly only follow men on twitter and women are also more likely to follow any men. I honestly do not know any men that twitter. The only dudes on my Twitter are Michael Ian Black, Chuck Palahanik, Perez Hilton, and Ben Stiller.
I think the kind of thinking that would persuade someone to twitter is probably more commonly present in women. Same with blogging and personal websites.
I'm not sure what significance analyzing gender on Twitter has anyways.