Next month, after 4.2 is released...
How long did it take for Verizon to push the 4.0.4 update after it was out?
I seem to always be defending Verizon but Verizon was the first to get 4.0.2. 4.0.4 did take the longest to come out but it was a newer build than the GSM one when it came out(VZW was also out of AOSP during this update process but they are now back on it). VZW got Jellybean no more than a month after it was announced by Google.(me thinks this has to do with being back on AOSP)
So imo VZW has a mixed record on the Galaxy Nexus but I would say an extremely quick update from ICS to Jellybean more than makes up for a very slow upgrade from one build of ICS to another.