As with most universities, the opportunities are there, and your education is what you make of it.
As to Rebecca's comments on large-scale projects, when DARPA funding first dried up, the CS and AI Lab (CSAIL) turned towards industrial sponsors and pursued a vision of pervasive computing, incorporating advancements in networking, speech, and NLP. But there has been no shortage of recent DARPA sponsored large-scale projects (e.g. the DARPA Grand Challenge, command and control systems for urban search and rescue, semi-autonomous forklifts for war zone unloading).