First I'd like to say that so far, performance seems a little bit better, but not near as much as I expected. I work with the 'File Structure' window open, and I wonder if this has anything to do with the performance issues I see (in a rather large project, over 175000 loc). Particularly what Isee is that I can usualyl type faster than VS can keep up when R# is open, and especially in WPF .xaml files the editor is very sluggish.
I've also noticed that memory usage is WAY WAY up in 6.1, granted this is an EAP build, but I'm seeing memory usages well over 3x what I had seen with 6.0.
1.32GB, where I used to normally be right around 250MB. I just started using dotCover though, so maybe that's the reason?
I would also add that I'm happy to give up the memory if it means better performance. :^O