I dont think you are right, I did some research yesterday, BitTorrent is not a real P2P software comparing to syncthing. There are servers in between Peers,
Few simple questions 1. Is BitTorrent Sync a real P2P connection without any outside server in the middle ? 2. Does BitTorrent inc keep any data that being transferred if there are servers in the middle of connections? 3. How long the data will be kept on BitTorrent's server / relay server ?