Id dawnguard is nothing more than slightly bigger dlc of pointlookout and much smaller than shivering isles or any morrowind like expansion .... There are nonsubforums formfallout dlcs or other es games expansions sonwhy for dawnguard ? Does bethesda pretend to pass it as a second game add on when is just 10 hour of gameplay?
Have you actually played it yet? Or are you just complaining because of someone saying they beat it in 10 hours?....I'm pretty sure that it takes 10 hours to beat ONE HALF of the DLC, seeing as you can be both a DG and Vampire, plus they probably just did the main quest and nothing else because I've heard of people getting between 20-30 hours out of it
My guess is due to the different release dates so the general forum isnt full of dawnguard info for those who dont want to know anything until it is released on pc/ps3.