I find it incredibly hard to believe we have the same diet as 100 years ago - 1907? No fast food, no ready meals, no monster chocolate bars, no hydrogenated fat, no Whoppa burgers?

If we could be made slim by a miracle drug WOULD it matter if we ate at Macdonalds and sat on the couch all day? I like some exercise - swimming and yoga make me feel good. But god I'd pay good money never to go to a gym again:-)

I agree that the article does seem to discount the non genetic components of obesity.