I will give you an answer.
I saw a report a few months ago that 56% of ALL mobile data traffic was on AT&Ts network and used by the iPhone users. Now consider, that Verizon had 82 Million users to AT&T's 19 Million users, that is a very strong statement about mobile data usage. Android users do not currently use the data that iPhone users use on a daily basis. So the potential is there that Verizon will have problems, but they have had more time to prepare and get ready so they may have no problems. AT&T was blindsided by the amount of data that iPhone users used.
That's scary when you read this quote from ATT:
AT&Ts pricing has taken current usage into consideration, with the carrier claiming that 98 percent of its users consume less than 2 GB per month, while 65 percent consume less than 200 MB.