This report is FALSE. I just checked the VZW Support twitter page and at 12:24PM someone asked the question because they had read that it was spam and VZW Support's response was "We did send out those messages to users that will be affected by the upgrade in order to have time to find other IM solutions. ^MS"
Link: Twitter
And here is a screen shot if it will allow me to uplaod:
It's strange because the text message doesn't actually suggest downloading another app so what would be the purpose of the message? Based on that I would say that the text seems legit. If it was spam it would only exist for the sole purpose of messing with us Razr users which is odd.
I can't say I'm surprised by the fact that there are different Verizon support personnel giving different answers but you would think they would know if something like this went out. I'm torn. It's very strange and obviously when we get word on the upgrade it will be official so this is all speculation. I just wanted to post this in case people were counting too heavily on it getting here in the next couple of days. Hopefully the story is incorrect and the rep that originally tweeted about the text being spam is wrong. It wouldn't be the first time!