-_-
i have been using utorrent for a long while already
and seriously, it really depends on how many seeders and tracker,
you are connected to, in order to provide you with good download
speed
and if you are using sp2, your tcp port is limited to 20
you need to open up more tcp port.......
and if you have the latest bitcomet version
you could use one of the function which is under that TCP/IP limit
function, change the limit from 20 to 100
and see whether, can you able to connect to more peers and
seeder
and how fast, your download speed depends on how popular is the
file, and are you connected to alot of seeder and peers?
my connection is also behind a firewall, but i still able to get
around 100 kb/s
or average 50 kb/s