Plus, Layton supposedly did well in the French-language debate, boosting the NDP's numbers in Quebec. I didn't watch the French debate, but Iggy stunk in the English-language debate, in my opinion - he came across as entitled, impatient and surly.
Iggy had a few good lines: "you shut down everything you cannot control"; "this isn't bickering, this is democracy"; "you treat the Parliament like a little debating society that gets in your way", etc. But overall, he sounded exasperated and, you said it, impatient. I don't think he said anything meaningful about the Liberal policies all night.
Jack Layton, on the other hand, seems to have stealthily crafted his image over these past couple election cycles: building momentum in '06 and '08, not getting too worked up over the prorogation and "coalition with the seperatists" nonsense, looking more and more "ministerial" all the time. He's always struck me as a very shrewd guy, if somewhat bland.
