Okay, I'm going to let my OCD loose for just a minute. <rant> The update that has been circulated is neither soaked nor OTA. It wasn't released at all and you certainly didn't get it OTA. According to Motorola, there has been no SOAK test yet. </rant> Now the reason for the rant is that I see future confusion by new users.
As far as confirmation goes, here are quotes from the Moto website by the employees that moderate the forum:
https://supportforums.motorola.com/message/460460#460460
and from
https://supportforums.motorola.com/message/460846#460846
and from
https://supportforums.motorola.com/message/461120#461120
and finally from
https://supportforums.motorola.com/message/461332#461332
Now while I'm quite sure some of this is unnecessary bluster--I'm especially suspicious about that last statement--I don't see any reason to doubt the statement about how the OTAs work.
And here is another reason to be rather anal about language. What is being talked about here is OTA, not downloading a future update that someone manages to grab off their phone before applying and posts.
I see at least two basic propositions about how OTAs could work, but have no clear information of which is correct:
1. The server contacts the phone and tells it an update is available from version x to version x(1).
2. The update.zip checks to make sure it is updating the proper version.
It isn't without possibility that the information above is wrong, but I see no reason to doubt it.