as a someone in graduate school for computer science [not cmu] I find this shocking and am INTENSELY curious about the details. hard to imagine a more effective resignation.
imagine if steve jobs resigned from apple because the boards was being sexist or something-I think that resignation would get a LOT of attention. that might be sorta similar to this situation.
First, because of their gravitas as prestigious researchers. (I'm actually a bit uncomfortable about that -- most people who experience gender discrimination haven't won Turing Awards, but we should still listen to them.)
Second, because sticking your neck out about gender issues guarantees a ferocious response and will make your life hell, so nobody does it whimsically. So what if they're not 35? Doing this at 75/80 is still incredibly unpleasant.
Like I said in my other post, I think we as members of the public do not have enough information to pass judgment. But if the Blums choose to say more, I hope we will all give them a fair hearing.
To me, what they have done by resigning is not more significant than someone young in their career simply speaking out. It is commendable that they spoke out, but I don't see the resignations as adding much punch.