Or is it? Dun dun dun.
A crafty Canadian has apparently found a way to enable LTE on the Nexus 4 by simply dialing " *#*#4636#*#*, ", which brings up a menu, and then simply selecting LTE. After a few moments, your phone will disconnect from the network and then pop right back on in LTE mode. Unfortunately, it only works on the 1700 MHz and 2100 MHz bands, which means us Yanks are out of luck.
This begs this the question of why Google would hide the fact that the Nexus 4 contains an LTE radio. Well, as Android Authority points out, it wouldn't be a very popular mood to announce LTE capabilities for Canada while depriving the US of the same.