Yes, FaceBook on 4S is sucking for both me and my wife. About 95% of the time is is painfully slow and non-responsive. Sometimes if I post a comment on a photo for example, it actually attaches my comment to a completely different photo. It's just very buggy. Zuckerberg needs to get his software people in line and put out an update. For what its worth though, FB on my wife's iPad is working fairly well.