It's nothing about being a 'man's world' at all.
It's a simple biological fact that men need more calories per day than women. On average they need 500 more than we do (2000 for women, 2,500 for men). Yet on the LL program they still eat 4 packs (same as us), therefore their daily 'calorie deficiency' is 500 calories MORE. And remember - 1lb of fat is equivalent of around 3,500 calories. So within a week, technically speaking, they lose an extra 1lb than we do.
Of course, as Pete rightly pointed out there are other factors, women's bodies are natually predisposed to 'hold on' to the weight a bit more due to basic needs to reproduce/nurture and survive etc.