I'm a physics professor with a research group that includes a computational aspect. We're pretty techie, using MPI parallel computation on our own cluster, and now CUDA computation on a numerical computation server, and run our own web server, and run specialized experimental hardware. One of my graduate students introduced a Mac to the group, and at this point we're all Mac users. I think we're somewhat techie...

What I like about the Mac is that the everyday stuff is easy, yet because it is Unix underneath you can open a terminal window and do anything you want that a Linux/Unix server would do. I think that's pretty techie...