I am responding to the thread in general, not to the last member that replied.
Wiki's encyclopedia says, "A common reported occurrence for banded patients is regurgitation of non acidic swallowed food from the upper pouch. This is commonly known as PB'ing and is not to be considered normal but a point to review how the patient is eating."
Well, lately, I have graduated from regurgitation of non acidic swallowed food to regurgitation of acidic swallowed food . I think that the regurgitation that I used to do was from the esophagus, but now the regurgitation is from the upper pouch, hence the acid.
Not that I have the right to critique Wiki, but I think they are wrong. PB'ing may be the regurgitation of food by lap-band patients, but if the food is coming from the pouch (which is part of the stomach) it would/should be called vomiting.