That phone was released before Google acquired Motorola.Normally I'd say that it isn't, but they do own Motorola now. I know that Google has stated that they want to give Motorola a lot of independence, but Google could probably mandate that Motorola provides better support for existing devices. Perhaps not really Google's fault, but they could certainly do something to fix it.
If there was ever such a mandate, it likely will only be effective for phones released after the acquisition took place in May of this year.
Motorola didn't release any device between May and September this year.
I will use their recently announced new devices(Droid Razr HD, Razr M, and Razr Maxx HD) to judge them about providing timely updates under Google's belt going forward.
I'm not willing to serve as a beta tester in that regard though.