Verizon FiOS does not have caps. Fiber to the home allows for massive bandwidth usage, and Verizon exploits that in their marketing. It would be pretty ironic if they capped a connection with a 15Mbps upload, which basically screams "torrent me!".
Here is how they "limit" you.
http://www.hardforum.com/showthread.php?t=1207924
or do a search for actiontec nat.