Please don't misunderstand me as saying anything about your weight other than it plays a larger role with climbing than any other area in cycling.
I agree. I appreciate what you are saying about the watts needed to go up the hill, and how hers will differ. It just miffed me a bit. Funny thing about weight. We'll look for lots of ways to make the bike skinnier and lightier, but the biggest area we can shed weight is that we carry with us all the time.
I think the last 'fatty' in the Tour De France I saw was the Fat Boy Jan Ullrich.
I could lose about 10Kg, but that'll be hard as I'd have to trade muscle mass and that's a product of my anaerobic development. I just read another reply, that the best way to climb hills is to get out there and climb them. It uses different muscle groupings so I think I just need to perservere.