Ok I'll do the test of the download...
I'm running a process that takes a lot of my bandwith juice, I'll see how it will go. (I need to find those leeks on the server)
EDIT:
All the downloading processes went very fast. I had still a marging on my Bandwith. The peak was at 285 Ko/s. It took me less than 2 mins for the 1st part (physX) and approximately 25 sec for the 2nd part (game data).
So for me, there's no issue