Come on now, when you talk about the size issue you can't bring up softies like Chistov and Bouchard. Or Steve Kariya.
Brule is not the biggest guy no doubt, but he is fiesty and a fierce competitor. Combine that with the skills he has and that separates him from the likes Chistov and Bouchard. Size is still in issue in the NHL, but not as much as so when the player is gritty and determined.
edit: I actually agree with you that Brule is not a clearcut number 2. However I think you are putting far too much stock into those two games you saw. To me Brule is clearly top 3 in this draft after Crosby and either before or after Johnson.