I have the FIOS 20/20 plan, and recently my download speeds are extremely slow, though upload speeds seem fine. If I run a speed test from speedtest.net, I only get 2000kbps. My upload speed however, is close to the rated 20000kbps. If I run the FIOS speed test, http://www2.verizon.net/micro/speedtest/java/, the performance is far worse, downloads, .344mbps, but the upload speed once again is close to 20Mbps.
I have tried restarting my router, and switching between wireless and wired connection, but neither made a difference. I just had my service setup last week, and the first few days it was fine, all the speed tests I ran were close to 20Mbps upload and download. Lately though performance is much slower.