Even if it's not Verizon exclusive, I still think Apple has a hand in this release date. Trust me.
Dialogue
Apple: We would like the release of the Thunderbolt pushed back to the March 17th.
Verizon: No
Apple: Aw c'mon, what's another week
Verizon: Are you nuts? Have you seen what these crazies out on Android Central are saying about us? We can't delay any longer.
Apple: Oh, what's that I see on the ground? Is that a suitcase full of cash? Must be yours.
Verizon: Oh....OK. March 17th it is.
Verizon:
whispers......Make sure we get Bennnnn some backup.
That's how I see it. Kind of similar to the way the Microsoft conversations went when Verizon put Bing on android phones.