There was a study on "hype" and presence in the customer's mind. It seems things only stay fresh in the customer's mind a few weeks. So starting the hype on titles especially if they are new titles is better only two/three months out. Established franchises are effected by this but not as much so as new IPs. And the "Nintendo Direct" that will be covering all thing (that Nintendo wants to talk about) Wii U is rumor to be at the end of this month to early September, giving them a two-to-three month ramp before launch.