They've already stated what was going to be in it, why make another announcement about the release that they may or may not live up to? And, besides that, if it's been submitted already EA has no control over when it's actually released - it's up to Sony and MS.
Also, I'm pretty sure there wasn't a whole lot of warning about one of last year's patches...I remember Madden and NCAA patches dropping on the same day last year (in the early morning hours) with little or no prior announcement. I'll do some digging to try and find the thread on here.