It's working fine for me for many hours now.
Seems that the trouble haunts some of us more than others. I've had some problems on W5, but never worse than others have had at the same time, and often better. If someone can think of a common factor that we could try to identify, we could post our individual stats/systems/whatever, to see if a pattern emerges. Just a thought. I know the devs are working on it already....