I've been on hormones for about a year and 8 months and they stopped growing for about 6 months or so. About a month ago they started back up and are still at it, so it's true that it takes time. They'll stop for periods of time, then start back up again. I think if you just give it at least 2 years, 3 or more sounds better, then you'll have a good estimation on your full potential. At that point is when you should consider whether you are happy with them or if you want to opt for surgery.