I find this theory very interesting. There is a lot of information out there on calorie restriction, and I found this article informative and unbiased. Take a look.
How are you making 2011 your healthiest year yet?
~one body, one life~
Jennifer
http://www.oprah.com/health/Dr-Oz-on-Living-Longer-with-a-Calorie-Restriction-Diet/5