Doesn’t surprise me. They require users to have LTE handsets because its cheaper/easier for them to move the traffic over LTE verse investing capital in that older hspa+ network. They will cover 270 million users by the end of the year with LTE and give them plenty of time to invest in any extra capacity necessary. Its not a capacity issue, as the majority of smartphones on their network are iPhones, which use Facetime. Its a business decision to stick a little extra cash in their pockets while moving users and traffic over to a more efficient network that they don’t have to throw as much money at because LTE is designed for such things.
Its a tab bit more subtle than Verizon’s blunt switch to the share everything plans…