I think they're wrong there. I think the continuing rise in the incidence and severity of obesity, accompanied as it tends to be by a host of co-morbidities - diabetes, cancer, stroke, heart disease, depression, et al, will greatly lower the average life expectancy and will also lower the proportion of the population that attains very long life.
My pessimistic outlook on this matter could be entirely turned round, however, if the powerful and influential medical lobbies could be prevailed upon to tell the truth about the causes of obesity, but this appears unlikely, as they have too much to gain by continuing with the lie that 'overeating' causes obesity and the other lie that 'just eating less and exercising more' reduces obesity, and too much to lose by telling the truth.
The main causes of obesity are pharmaceutical drug side-effects, salty processed food, dieting and, overwhelmingly, misinformation from the 'experts'.
Lose weight, reduce your risk of most cancers, high blood pressure, type 2 diabetes, heart disease, heart attack, vascular dementia, stroke, osteopenia, osteoporosis, hypercholesterolaemia, depression, liver damage and kidney problems, and improve your health in many other ways without drugs, hunger or expense by eating less salt! - Try it! - You will feel so much better! See my website www.wildeaboutsteroids.co.uk
The site does not sell anything and has no banners or sponsors or adverts - just helpful information.
Read my Mensa article on Obesity and the Salt ConnectionSodium in foods
Children and Obesity
See also FAT RETENTION
advice for pregnant mothers
http://www.wildeaboutsteroids.co.uk/story.html - my 'political' page
http://www.wildeaboutsteroids.co.uk/socio.html - social and economic considerations
I can be contacted from my website if you need my further help. My help is free.