Was hoping in his comparison of download size that he'd mention the total size of all included libraries. I've not used either yet (only watched some talks, etc), but have noticed a few times Yehuda argue that Ember is bigger because it includes a lot of functionality you would use 3rd party libraries for in Angular. E.g., if you add up all the libraries most people use with Angular, that are included out of the box in Ember, they'd be similar.
It really depends what you need. I just launched a pretty trivial Angular app, which required ngRoute and a local storage interface. Total size of the three: 112.7k. All the standard-issue angular modules put together amount to 129k.
For non-trivial stuff, I'm sure people need a bunch more extras, third party libraries and so on. But it's a pretty major bonus for Angular that you can use it productively either for a full SPA, or for the kind of trivialities that one typically duct-tapes together with jquery. The small-ish size (I know, not THAT small) is part of that, but so is the flexible and modular design.
Not that I dislike Ember - it's very nice. And I am in the fortunate position at the moment where page-load size is not a huge concern (or rather, a battle that has already been lost before I clock in).
Does that hold any water?