My surgeon recommended G2 also. To fulfill carb. requirements. I was unsure about it also. I am 4 mo. out from RNY now. It didn't seem to slow my weight loss or cause dumping, probably due to the low amount of sugar.
I am 7 weeks out and I also dumped after drinking a Protein shake too fast. Really makes you slow down. lol The only other thing that made me dump was liquid tylenol. weird, I know. It def. is a learning process of trial and error. Take Care!