A bit more testing around Clifton Park. It seems like there are two towers with upgrades and one broadcasting LTE.
It can be seen near exit 9 from Clifton Commons.
The other one on the Halfmoon Side seems to have NV upgrades for 3G. Speedtests on 3G were 1.2mbit symmertrical, and 3G on the LTE site is about 1.5 symmetrical. I ran nearly a dozen tests.
What is neat is that LTE holds on as long as possible to your phone. So if you are comming up north you would have full 3G and then it drops to 1 bar of LTE.
That being said, you can be right next to the tower as I was, went into Petco to get some dogfood and it signal dropped to 3G. 3G inside the store was still above 1 mbit barely, which is much better than the 200/100kbit we usually get. 1900 does not penetrate buildings at all even next to the tower. This is like WIMAX all over again.
I had WIMAX for years when I lived next to St. Peters. It would for from full to 1-2 bars inside. We really need that 800Mhz penetration, because VZ here is LTE everywhere and building or not it stays up well. My work phone is VZ LTE and it is rock solid, we need this on sprint.