Here is a study that agrees with a another study I can't find.
"The early postoperative gastric volume was 108 +/- 25 ml (80-120 ml) and 116.2 +/- 78.24 assessed with barium sulfate and CAT scan, respectively. The gastric capacity at the late control increased to 250 +/- 85 and 254 +/- 56.8 assessed with the same techniques. However, patients remained stable with a BMI close to 25 without regain of weight at least at the time of observation."
So in other words it went from about 4 oz to 8 oz. Big fat hairy deal right? Some will call this significant, but even at 50% you still are left with 1 cup or 8 fl. oz. or so. Just don't overeat or eat around your sleeve (slider foods, alcohol, drink with meals, etc.) get your eating habits under control during the first year and make sure you are eating healthy.
Oops, forgot the link:
http://www.ncbi.nlm....pubmed/19533260
Here is another interesting study. I can believe that dilation would not lead to weight regain because there is still plenty of restriction
http://www.weightlos...astrectomy.html