Comment by wolrah

> The machine doing the torrenting is tied directly to the access point, everything else is over wifi.

That still doesn't make it faster to just torrent them again.

If the LAN is slower than the WAN then a large file where the transfer time is long enough that the few milliseconds of setup latency is irrelevant might be effectively equally fast to re-download from than to transfer over the LAN, but never faster, and in most cases the LAN is going to be more reliable.

There are almost certainly some cases where BitTorrent can transfer a specific set of files faster than common LAN transfer protocols, especially FTP or older versions of SMB when faced with large collections of small files, but that's an entirely different matter.

If the bottleneck in either case is the second PC's LAN interface how could the WAN possibly be a faster source than the LAN machine?