Does dawnguard get released early for X-box?

Does dawnguard get an early release on X-Box or is it the same for all systems?

I think its exclusive to xbox for a month.

Edit: Yep "at least 30 days"

http://www.joystiq.com/2011/08/26/skyrim-dlc-packs-heading-to-xbox-360-first/

aww that sucks

m$ paid good money for that.

Even though we have to wait 30 days, we have the Steam workshop :p