@flopjoke
It is never good to generalise based on YOUR OWN experience in such a way as you do. Look around - most people are experiencing a smoother operation after PR1.3. So you are minority in your experience, but you do insist that the majority are just delusional or simply lying.
Yes - there are regressions in PR1.3. But to be able to state it is general issue/regression you have to get some statistic and confirmation from other users, after that you have to make sure the issue/regression is not caused by some other factor.
Speaking of MY OWN experience with PR1.3 - general feel is smoother and battery life is better. Even if smoothness is a matter of perception and can not be (easily)measured, battery life is something you CAN measure. But I have to admit it can be caused by some other factor, not directly related to PR1.3.