this update was probably not a myth... but rather some phones fail to receive "patch" updates which the normal update was. What I mean by that is the normal update didn't include a complete set of files for the system partition. Some phones, due to obscure bugs or for whatever reason, fail to update. Verizon then sends out these "phantom" updates, but only to a certain few, that contains a complete full system image... My guess is this is what this is... And if you updated fine you should not worry cause you will not receive anything.
This update was definitely NOT 2.2 or any minor update in version at all. My guess again is that this is one of the things that spreads annoyingly. I believe we can put this to rest.