Call Verizon's help desk and ask them about that speed. As LOTR pointed out, Verizon probably has various speed packages.

Better yet, run the test several times when all other internet apps (like LimeWire) are not running, to make sure it wasn't just an unlucky test.

Let us know what they say (and the other speeds you get), and we can test what kinds of speeds you get with LimeWire next.