Expanding Verizon LTE

I live in Hollister, CA. Ever since I got my GNex I've only had 3G here in town, but randomly today I got hit with a GREAT 4G signal (40mb down/20mb up) for a few hours today from about 2pm to around 4pm or so.

Sadly, I'm back down to 3G, so I'm hoping this is a good sign of things to come.

Has this happened to anyone else and then found their city got 4G not too long afterward? Did anyone else experience anything like this today as well?