The first Nehalem architecture Intel Core i7s were introduced on a high-end platform, LGA 1366, in November 2008, before being rolled out for the mid-range in 2009 on LGA 1156.
With Sandy Bridge, Intel has done things the other way around and LGA 1155 became available ten months ago with the higher-end roll out only coming on LGA 2011 now. Better late than never?