The Associated Press put Comcast's file sharing filter to the test and came to the conclusion that if you are trying to download the bible using BitTorrent, you're out of luck. An AP reporter attempted to download, using file-sharing program BitTorrent, a copy of the King James Bible from two computers in the Philadelphia and San Francisco areas, both of which were connected to the Internet through Comcast cable modems. In two out of three tries, the transfer was blocked. In the third, the transfer started only after a 10-minute delay.

Further analysis of the transfer attempt from the Comcast-connected computer in the San Francisco area revealed that the failure was due to "reset" packets that the two computers received, carrying the return address of the other computer. Those packets tell the receiving computer to stop communicating with the sender. However, the traffic analyzer software running on each computer showed that neither computer actually sent the packets. That means they originated somewhere in between, with faked return addresses.

In tests analyzing the traffic received by a computer on Time Warner Cable that was trying to download a file from a large "swarm" of BitTorrent users, more than half of the reset packets received carried the return addresses of Comcast subscribers, even though Comcast's 12.4 million residential customers make up only about 20 percent of U.S. broadband subscribers. It was the only U.S. Internet service provider whose subscribers consistently appeared to send reset packets (which are occasionally generated legitimately).