I'll just copy my comment from your other comment, kinetic:
The weight loss was pretty much immediate. Within a week I was down two pounds. At four months in, I was 155, the lowest weight I'd been since I was a teenager. Over the course of the next year, with some tweaks (dropping wine and dairy, for instance) I made it to 146, a weight I hadn't seen since I was twelve years old.
VLC worked for me to a point; I went from 220 to 190 (roughly), but then stalled for over a year. ZC did the trick, but I still don't know why. I'm pretty sure it's a simple matter of carbohydrate in my body: my weight tracks perfectly with carb intake (even in cream and eggs). Add some, and up I go. Take some out, and the weight drops, even with a lot of bacon, ribeye fat, and butter. (My other theory -- more interesting but possibly less plausible -- is that I'm extremely sensitive to most plant matter, and that inflammation from their so-called "secondary compounds" is causing me to put on body fat.)
I do want to add that I've known of at least a couple of overweight women who stuck with it quite strictly for over a year who didn't seem to lose any weight at all. They're in the minority, but they exist. Very mysterious, these bodies of ours are.