Here are a comparison of technologies adoption, thanks to the "google trends" tool, each comparing :
angularjs tutorial (in red)
[techname] tutorial (in blue)
The word "tutorial" help here to avoid noise signal due to ambiguous name (jsf is a too generic acronym), and it also help to detect which technology people will in adopt in the very near future (thus avoiding noise due to maintenance on an old technology).
The date following indicates when AngularJS overrun the [techname] technology.
Via William delmas