The F-22 itself was delayed because of the end of the cold war. The original plans were to have it enter service in 1995, and then this slipped by a year or two. They could have had it being pass produced from 1997, but they delayed it because of the peace dividend. (This is from Aronstein et al, "ATF to F-22 Raptor"). So one should not consider the 2005 date as "how long it took".