If he’s using less energy?
Of course whales don’t use very much energy, duh, if they burned fat instead of storing it, they wouldn’t be such big fat fatties…(Don’t worry about me, folks, I never was going to swim in the ocean again, anyway.)
I’m bumping this slightly zombie thread (last posted to in Dec 2010, eight months ago) to note that Cecil Himself has tackled this in his current column: http://www.straightdope.com/columns/read/3010/does-the-average-american-use-more-energy-than-a-blue-whale
Congratulations, petew83, on being one of the lucky few!
My first thought on reading the title of this thread was:
“Well, I dunna, but someone’s gonna have to go back and get a shitload of di- I mean krill.”
I’m so glad no one else posted that. 
You couldn’t use more clean burning lamp oil?
So you’re saying that Cecil can bring whales back to life? Add that to list, I guess.