Hmm, doing other things... which would lend credence to the stereotype?
Personally, I hate generalisations myself, but sometimes I can see why they come about. Heh, a contradiction of sorts: I can accept generalisations, but only in specific cases.
The internet connection in my uni's library a quite decent, so I go there nearly every morning since, I tend to get to uni well before classes start. The population there is quite balanced gender wise, and there are plenty of female techs/supervisors, but from what I glance at, the females tend to just use the internet for e-mail, and occasionally for real-time chat. The guys tend to do more in-depth surfing esp for assignments and such.