After day 1 of the BBC's coverage, I do have to confess preference! They are FAR less biased (for obvious reasons) and I enjoy the actual, you know, showing of SPORTS than human interest stories every 10 minutes. I also love Freeview and the red button...I got to flip between men's gymnastics and swimming and it was brilliant! I love getting to choose what /I/ want to watch rather than NBC's naff coverage (while pretty thorough, it obviously has a HUGE pro-American slant so much that you wind up missing other countries/athletes).
So far, so good for the broadcasting. I almost feel bad because there's been very little British success so far, but I'm so used to the American medal derby that anything will seem small in comparison!