I've been mapping out LTE in the the Eau Claire, WI area with Sensorly. We're part of the Minnesota Market, and on Sprint's list for first cities to be upgraded to LTE. The speeds are great, but unfortunately there's no LTE coverage in the downtown, and very weak/spotty coverate at the University, so I don't get to use it very much.
Judging from the maps on network.sprint.com and the sensorly data, it looks like two of our sites have been upgraded so far, plus another one or two up near Chippewa Falls.