Can you point to some example that are a bit more complex in nature? My issue (that I identified with the backbone tutorials and re affirmed with the Angular tutorials) is that simple apps are easy to do with x, y or z. But if the new one or that one is going to replace the old one there should be 37 signals level complexity type apps out there. While I can't speak for Meteor, I don't see anything running on angular that's at that level.

Caveats: I glossed over the fact that angular is not a full stack, I have seen a few angular videos where teams have demoed and presented on complex angular apps.