A friend of mine said to stay away from the update for now. It's quite buggy. If you haven't upgraded, maybe wait a bit. 7.0.1 will come out before "too long" to address the bugs.
Ad Block Plus makes a browser app ( instead of Safari) that removes all of the advertising. I've done limited testing on it so far, but I like it better on my iPhone. Worth a try. It's in the App store.