I agree that Flash is awful. But there are two different arguments here:
1) Flash is awful
2) Flash is the _only_ contributor to power drain so lets vilify it, and let's ignore HTML5 ads for now. (this was DaringFireball's implication)
The article does a wonderful job of demonstrating a very near future where John Gruber's Macbook will have 2 hours of battery life thanks to spinning gerbil HTML5 ads.
Again, I'm all for disabling Flash, but DF's constant championing of HTML5 as a panacea for all of Flash's forthcomings needs to be stopped (it's becoming a religion).
If anything, this article encourages a more constructive discussion than the trolling DF does.