I somehow find it hard to believe that it was a boost moto g. As far as I know and could be wrong the boost variant wouldn't need to update the moto updater as the update won't come directly from moto. It will be pushed thru boost/sprint as a carrier update. I may be wrong though.
I'm not sure what you really know about Android services, phone services, software, and how it all works, but you are wrong Timmy. I hope that doesnt sound disrespectful, that's not how I intend it to sou d. Yes, the update to 5.0.1 will be released from Motorola to the carriers, and the carriers will make changes to work with their services and release it OTA. However, in order for Motorola phones running 4.4.x to update to 5.0 the Motorola updater has to be updated to make the new android OS compatible with the phone. I'm not sure about the 2nd gen, but the 1st gen moto g was released with jelly bean, the shortly after kit Kat was released. 5.0 wasn't even thought of as being an OS for the moto g yet. Meaning some aspects of the phone need to be updated before it can handle 5.0. I have boost mobile, just got the update for the Motorola update service about a month ago. In the description it says this is to get your phone ready for the update to 5.0.
So far it has only updated specific aspects of the phone, such as a new gallery (maybe 5.0's gallery, not sure), the camera software, and one or two other things that were Motorola software. About half my apps also updated immediately after the Motorola Updater finished installing. Not sure if that was a coincidence or not.
Since I have boost, and it is prepaid, it will probably be awhile before I get 5.0, but I have a friend with Verizon, who has the 1st gen moto g, and he got the Motorola update service update around the same time as me. His moto g finally got the 5.0 update 2 or 3 days ago and he loves it.
Motorola does have a section on their site where you can look up your phone, put in your carrier, and it will tell you if and when you will get the update. For boost it still says they are waiting for the carrier to say when it will be released. I hope this helps!