Um, since when has "all" the DLC been out for a prior Bethesda title by this point?
As I recall, Shivering Isles came out a full year after Oblivion. Same with Bloodmoon. Going by previous games, Dawnguard came out in an expected time window, and we can probably expect another DLC by the end of the year.
I said
most if not all and we're coming up on a full year for Skyrim. But Fallout 3 had ALL 5 of its DLC in less than a year (FO3 released October 28, 2008 FO3 GOTY October 13, 2009)
Yes Morrowind took 1 full year for 2 DLC and so did Oblivion for its 2 major DLC but it also had a ton of other add-ons (not counting Horse Armor but Mehrunes' Razor and the multitude of player housing options with quests) that kept people interested til SI.