Check the forum for other posts on SLOW.
Personally, I detect no perceived differences but I have not gone through extensive testing, just opened up a couple of recent projects and banged around. Also check for recent posts by Adobe's Todd Kopriva. He may be pointing to a specific place to post your observations and feedback about the recent updates.
I'm finding it extremely slow. To the point that it is hard to use. I hit save and it takes forever to save. It take a minute or two to open a document. I didn't have any of those issues before the upgrade. Not very happy.