DS1 had a t-t that prevented him from attaching. We got it snipped at 3 weeks and it really was such a quick and simple procedure. We never looked back after that - he was able to attach well etc.

At time when when we were researching it, we read about the potential for speech problems down the track, and also dental decay due to not being able to clear food from the mouth effectively. So if it was me I would probably have it done early, while it is still a simple procedure.