I have the new Google for over a week now. I haven't seen any fluctuations back to the old style.
I look the nice clean look and feel of it, but I am not sure about the adwords. They look "too much" like a regular listing, and I can imagine they are taking a good bit of traffic away from the "free" listings.
I have a site that is
#10 under a very highly targeted keyword. There are 9 adword advertisers to the right. In reality, my site is more like
#19 now, because the users actually see all the adword listings before they get down to
#10
Now more than ever, it will pay to hold the top 2 or 3 positions.