User blog comment:G0LD3NF1RE/Dawnguard encounters issues with Playstation/@comment-79.20.123.177-20120903121007/@comment-67.80.251.56-20120904011623

Well, considering that Microsoft paid to make Dawnguard exclusive for 30 days and that PS3 seems to be Xbox 360's chief competitor, I wouldn't put it past them either. I mean a second DLC has been announced and again Xbox 360 users get it first.

There definitely seems that there is something going on between Bethesda and Microsoft.