The results and analysis for Blu-ray (and DVD) sales for the week ending 12th February 2011 has just been posted. Blu-ray market share recorded its lowest result in mid-November of 2010, as the best selling titles on all discs (both Blu-ray and DVD, combined) all recorded fairly low Blu-ray market share results. Paranormal Activity 2 was the week's top selling Blu-ray title.
In fact, none of the top 10 selling Blu-ray titles recorded a market share result high enough to even get into the top 20 Blu-ray market share chart (meaning there were 20 Blu-ray titles that had a bigger Blu-ray market share than any of the 4 new releases in the top 10.
You can read the rest of the stats and analysis here.