For those of you lucky enough to have an XLTE ready phone and live in one of the launch cities, I recommend you try it out. I was getting download speeds of 20mbps with upload speeds of 5mbps. Very very nice stuff
One of my staff is on Verizon with an iPhone 5 just outside Phoenix. He was getting 30Mb d/l speeds. He told me he wasn't going to use the company's WiFi anymore for his personal connectivity which is a good thing since I was going to talk to him about his internet usage reports anyway. ;-)
I finally got it. It rolled out here in Honolulu, but I never saw a difference. I just updated to WP8.1 update 1 today, so I'm wondering if that had anything to do with it...
I live in a low-signal area and get 20-30 Mbps. However, I've had co-workers and customers claim up to 70Mbps depending on the situation. (This was before XLTE.) As with any internet connection, It's partially what you have, and partially the server you're connecting to. (Also keep in mind that many cellular devices will connect through a local ISP, such as a DSL provider at some point, so whatever they get can influence what you get.)