Generally with P2P downloads, the more people who are connected the better the speed. The problem with the downloader is that, in P2P terms, there is only one seed (the update server) and many leechers (who will never become seeds). As soon as a user's download hits 100%, they are disconnected from the torrent and so will stop uploading to anyone else.
So to answer your question.... maybe? (It'll always vary, hard to say how updates will go in the future, will hopefully be better if they activate regional update servers so we can have multiple seeds, one of which is semi-local to us.)
FFXI: Triane [Caitsith], Retired DRK75, THF75, RDM71
FFXIV: Triane Rhiga
[Besaid] Pugilist, Marauder, Fisher