As Anti-Phish says, it will be helpful to know what version of router you have.
You should also tell us if you're testing over WiFi or a wired connection. WiFi speeds are not guaranteed. For best results, you need to use a wired connection.
For the record, I routinely pull 60Mbps(*) from my Actiontec Rev I. over Ethernet. My WiFi speeds vary depending on the device and distance from the router. I have to run 802.11n/g "compatibility mode" as I have some "g" only devices. This slows my WiFi down a bit.
(*) I get 60Mbps because I have the 50/50 plan and TV. Verizon gives TV users an extra 10Mbps to cover on-demand bandwidth.