Not sure if this is a new feature or a bug so let's see if more people have this.
I installed the beta of 10.11 last night to start updating our app codes.
While working I've noticed that everytime when I move the cursor really fast it grows on screens and scales back when stopping/slowing down.
If this is a feature... it's definitely gonna take some time to get used to.
Also it's impossible to record this in either video or screenshot.
The OSX screenshot function removes the cursor automatically
and everytime I started a screen recording with either Quicktime or Camtasia 2 the "Feature" would not present itself.