Hmm - I know in AfRocks they have found that specimens who eat more live shorter lives, and recently caught a bit on the science channel where they cited Okinawans (represent) live exceptionally low lives due to low overall caloric intake. It has been suggested previously (in general terms) that your life-span may be more closely tied to a caloric ceiling rather than the number of beats your heart is capable of etc.
While I might find it plausible I won't be switching from my scheduled feedings.