I can accept that, as men have more muscle, their bodies will tend to burn into fat reserves more when the diet is altered to induce weight loss.

That being said, I think this is more of an excuse than anything else.

I have been lifting/cardio/core 4 days a week 1.5 hours a day, running 2 days a week, and doing jujitsu 2 days a week, while cutting out all sweets, empty carbs and the like (Atkins 20/40). If anyone, male or female does this, they will effectively lose weight.

(note: I have a 15 year old son that I work out with...very few can do it alone)