AT&T shows its support for Nokia by releasing the Lumia on Easter

I would be curious if anyone here has any insight into this decision.

It was announced that: "Nokia Lumia 900 Will Be AT&T’s Biggest Launch Event to Date" (http://www.gottabemobile.com/2012/03/29/nokia-lumia-900-will...)

Is this irrelevant? Could ATT, MS or even Nokia have secret reason for such apparent sabotage of the release? Is this bureaucracy-as-usual or has the MS/Nokia alliance already dived seriously into the ditch?