A very nice comparison of the 4 leading JS MVC frameworks.
Relevant mostly to the FEDs among us, but not only. Notice at the end of the article there is a responsive table which sum up all the categories which were compared. You can play with the relevance and see which frameworks suits your needs.
We in analytics started using Angular JS and very satisfied from the performance and flexibility of that framework.
See the full comparison
Looking at the most searched terms in the web lately, Angular JS is surly the most popular one..