Update: after HOURS on the phone with apple and verizon:
--restored phone. no change
--apple ios6 tech has me turning off wifi altogether to measure typical usage, establish a baseline, and then we will try with wifi on. He thinks that the iphone is using LTE even though wifi symbol on.
--verizon is investigating. They are confirming by email tomorrow that I will not be charged for an overage while they are sorting this out.
Frankly, I'd just return it, but I compared speeds on LTE with my wife's ATT,and the verizon is about 3-4x faster!!!
Seems to be specific to Verizon models from what I'm seeing.