When it comes to performance it is great in Chrome. In other browsers not so. I hope v2 will be much better once they can get rid of the compatibility layer for other ever-green browsers.
It is much faster than Angular - somewhere around React performance. Polymer is picked up by big companies already whereas "no one"(big) is using angular 2.x for now.
People here seem to project a weird bubble around Angular/React.
> In other browsers not so. I hope v2 will be much better once they can get rid of the compatibility layer for other ever-green browsers.
Browsers get rid of it on their own - when they implement the standards, shims load when specific functionality is found or not.
The Angular team has made significant efforts to court them/cater to them, even employing a CSM, and two developer advocates. Those are just examples I've heard/interacted with in the wild, but I'm just a developer at a small company & not part of the Angular team.