I have been slow to report this to convince myself that it is real, but since the update I have been seeing an increase in occasional "dropped frames" when flying over very dense urban scenery. I am also experiencing a strange distortion in the scenery when looking at a 30-40 degree angle from directly forward. It almost appears that a small area of the scenery is "boiling". It isn't constant, but it is frequent.
This is in VR and yes I have the latest Nvidia drivers.
I know there isn't much you can do based on such a vague report, but I wanted to add my report to the few others that are reporting similar issues.