That's what I thought, that the "skim milks" that removed the fat just replaced it with sugar. Low carb is about avoiding sugar so regular milk is in essence better that sugar-boosted milk. We always go for the low carb milk varieties. It is very tasty.
I found out from my mother's endocrinologist (she's a diabetic who has also had her right adrenal gland removed due to a tumor on it!) that skim milk doesn't actually *add* sugar to make up for the fat. The fact that the fat is missing makes the natural sugars in the milk react in the system quicker (higher glycemic index) so that's why it lists more carbs.
Her Dr. had been telling her when her sugar bottomed out to drink milk instead of OJ to bring it up, because it worked faster, except she kept drinking 2%, and it wasn't working. So he explained to her the difference between whole, 2%, and skim.
2%, or even the 1%, wouldn't be too bad for someone on a low carb diet, if they really couldnt handle the taste of the "low-carb" milks. There is enough fat in them to slow down the lactose (which is the sugar in milk).