Weight Regain
what do you mean by "fast"? (sorry if this is some well known term i'm not yet familiar with)
Have you read the Revision board? WLS Regrets? WLS Failures?
Yes, lots of people of all surgery types have experienced regain. Some gain a little, some gain a lot and lose it again, some gain a moderate amount and maintain at that weight, and some wind up heavier than they were before surgery. Statistically, the Band has the least long-term success, the VSG and the RNY are pretty much tied in the middle, and the DS has the best long-term results. I personally am 9.5 years post-op and my weight has been the same---well, it bounces up and down by about five pounds---for the past 8 years. Since I lost 170 pounds, *I* think that's pretty amazing, and I give 100% of the credit to my DS. ('Cause I eat VERY WELL! *grin*)