said by Ree :
So what kind of upstream is required for ACK packets on a 32mbit download? Rogers says they throttle to 80kbit, so I guess that's not enough?
Don't forget about the overhead.
I rarely have downstream speed issues with torrents (rarely enough that it's probably those specific torrents, not my connection), even without capping my upload speeds (which usually stabilize around the definitely-throttled speeds of 8kB/s).
Do you have number of connection limits set?