I like a good scrap. I agree with Powers that there's really nothing new on a tech level to Twitter or many other "social apps". But somebody put them out there and lots of people are using/enjoying them. You, Robert, are probably an example of several of ways Twitter may be used. That's great.
I don't get her point that somehow new,meaningful, advances in technology will be missed due to participation or interest in things like Twitter. I expect to hear about such technology through channels like Twitter. I'll probably get some user feedback, too.