First the Episcopalians gave us V. Gene Robinson of New Hampshire, the openly gay bishop who left his wife and kids to have sex with a man and later revealed that he had been a closet alcoholic for years. He was the obvious choice because he is just like Jesus with the minor exceptions of his beliefs and life.
For some reason that I still haven't got to the bottom of, Driscoll seems to be a hugely controversial figure. There are some suggestions of reasons why here. For my part, having listened to a few sermons of his online, he seems like a faithful Bible teacher who is particularly gifted at communicating with fairly unchurched young adults. Very clear, and the kind of guy "normal people" could (and do) listen to for an hour or so. He's also better than most at avoiding assuming things that everyone else seems to assume. (His sermons are available via the Mars Hill website).