Here is a german news article about blu ray sales charts in germany:
http://www.mediabiz.de/video/news/kaufcharts-star-wars-mit-fulminantem-blu-ray-start/310059
The complete box immediately place itsself on Top 1 of the blu ray charts. The OT box hits Top 20, while Prequel Trilogy is not in the Top 20 at all.
These are only the numbers for germany, where Lucasfilm really fixed some major audio issues that have been there since 1997.