I used to have a RAZR and then got the Nexus. In the town where I live, the RAZR got around 18mbps down and 10mbps up. My Nexus was getting around 6mbps down and 5mbps up.
I'm visiting family and just went into the VZW store to check out the phones they had there. Tested out the Rezound, Nexus, and RAZR. The Nexus was the fastest with less than 10mbps down, but my Nexus was slower, still getting around 6 down and 5 up.
Called tech support. They told me to just remove the SIM card and pop it back in. Same phone and coverage area, looks like this now:
View attachment 44517
I'm excited to see what happens when I get back home with the faster 4G.
Cliff Notes: If you're having slow 4G, try removing your SIM card and putting it back in.