My most recent article is up on Torrent of Fire. I took a look at the numbers from the NOVA Open GT and how they compare to 7th Edition data leading up to it.
I also took a look at how my predictions leading up to NOVA as far as the top bracket panned out. I'm fairly comfortable with the results. I had 11 of the 16 armies more or less correct. The surprise to me was no Space Marine primaries making the top bracket, though a Grey Knight list with Marine allies is close.
Anyway, check out the full article for more details and analysis.