A very interesting thread Sarah. I have read Taubes book, and it and similar teaching has probably influenced my diet over the years but I haven't really taken it on in full and don't really plan to. I certainly eat less carbs than I used to but still 1-3 serves a day, (mostly wholegrain) I switched back to full cream milk, and eat more protein than I used to
There are certainly so many individual variations and so hard to generalise - it is even hard to compare what "I used to eat whatever I wanted" actually means in practise!
I have never been overweight as such (though of course wouldn't mind being a bit thinner) which in itself helps with weight control I think - as in less fat cells to shrink. I attribute it to heredity, an active youth that probably built up my muscles, not liking savory snacks like chips, BBQ sauce or being very fond of soft drinks, frugality, in that I rarely buy food for myself when out, not being a big drinker who had huge nights out and who knows how long I had coeliac disease may have affected my food absorption. (I am finding it harder to maintain now, though being in my 40's could be a contributory factor)
I am dealing with higher body fat than I'd like (despite a BMI of around 21) but I'm fairly convinced the answer for me lies, like you have already discussed, in weight training. I'm still mostly working on my form after some injury, but that, plus getting back to intervals once i recover, is where I'm planning to head.
Also, I find when lowering carbs I'm definitely wanting to eat more fat, and I do find overeating that is pretty easy to do, with accompanying no loss of weight.