One thing to consider is that you can't really force your body to lose weight at the rate you want it to (though don't we all wish we could

). So it doesn't really seem productive to talk about what you "should be" losing - your body determines that, no matter how many calories you consume or in what way. A million little things could be going on that your body is taking care of and that you have on control over. So maybe focusing less on how much you feel you "should" lose as opposed to how you really do feel (how your clothes fit, how much energy you have, etc) is more important, especially if you really only have 10 pounds left to lose.
Another thing to just think about - low carb doesn't necessarily guarantee fast and effective (and even safe) weight loss. I used to be a huge believer in low carb diets several years back and lost 35 pounds on them. Then I became a vegetarian and then a vegan, life pressures and stress took over, went into binge eating mode, and gained the 35 plus 30 more back. Since I am now a vegan, going low carb isn't an option, so I started exploring other vegan options and came across the other end of the spectrum - the very low fat (10-15% of calories) vegan diet of veggies, fruits, whole grains, and beans.
Since starting the McDougall diet (which I call the anti-low carb diet because it does everything that low carbing does not - centered around whole grains and potatoes and veggies, limited fruit, no added fats at all) in June, I've lost 12 pounds. It took some getting used to and I am not 100% compliant (I add a teaspoon of flaxseed oil once a day to salad), but I like it a lot and plan on sticking with it for the long term. My calorie count is actually around 1200, not because I'm consciously counting them, but because, with no added fat, the food I eat simply comes up to about that.
My point here is not that McDougall is better than low carbing or that low carbing is bad. It's more that different diets work for different people and it's not a given that every diet will work for everyone even if it has a reputation for fast weight loss

.
Tam