There is no logic behind it. And I don't like the term "HD consoles" as many blockbuster games, like GTA IV and Halo 3, aren't even HD.
Blockbusters are on lesser-selling consoles because in 2005 / 2006 when these games began development, they assumed (as did everyone) that nobody would buy "Revolution."
AAA games take between 2 to 4 years to develop.







