Yes, the thing about people who get fat is that they have a genetic "defect"-- their insulin production is way out of whack. In reading all this low carb stuff (Taubes et al.,) what comes across is that some people are lucky-- they never have problems with weight, no matter what they eat.

It is actually a kind of leap to say "oh, so I am not the "normal" one." Something has gone wrong with your fat storage mechanism. This defect either has, or will become diabetes. The sad thing is that apparently more of the population has this genetic defect now. It is not just "sugar" but it is the specific person's reaction to sugar. We're not all "cookie cutter" similar. Some of us can take more sugar than others.