Some of my colleagues did some perf testing for mobile and found Angular.js was not suitable (I guess due to the compilation it does). I don't have any numbers unfortunately, but I think we use mostly Backbone for mobile projects here.

Thanks for the tip. Would be interested in stats. It's such a timesink to evaluate any of this new stuff. There's clearly a market for a tomshardware.com equivalent for frameworks and software stacks.

See my reply to welder above on the topic of Backbone.js. I had just finished a project using it before I came to this job and I was quite certain I didn't want to use Backbone.js again. I knew there were better solutions out there. The t-shirt thing was actually an experiment to try out AngularJS and see if it was good enough for our needs here.

I had meant to do the same with Ember.js as well but AngularJS did the job so well that I decided to just go with it. So possibly Ember.js is even better. I don't know. But I can say we haven't really regretted AngularJS yet.