Is this X360 exclusive Fall 2009 lineup enough to battle Sony?

[WereKitten]

JRPG said:

Microsoft likes to only annouce game that are coming out that year. Unlike sony whom announce games that will come out 3 years later.

You make this sound like a rule, but it's rather an exception. Any other case than Gears 2 of less than six months between announcement and release?