However my thought on the hold off of the G Nex release is explained by the situation below:
Average customer walks into the store. See's a bunch of Android phones, however 1 of them appears to be different. Looks and plays around with it, likes the cool new fresh look and features, then asks the service rep, "So why does only this phone have the cool android operating system?" Rep says "Oh that, that's Google's newest Android operating system Ice Cream Sandwich." Customer replies, "Well why don't all these other phones have the new operating system?" Service rep replies, "Oh they'll get the update sometime next year." Customer replies "I don't want my new $300 phone to be outdated already, I'll buy this Nexus phone with the new operating system."
That is what the average customer will say upon their visit to the Verizon store once the Nexus arrives. Thus, in order to sell more of their current phones and not make them seem outdated, they will hold off on the Nexus for a bit.