given that various speedtest on the net measure my uploading performance between 900-980kbit it seems that 100kb is indeed 100%

you have a point, the thing is I have an 12mbit/1mbit line and when I am downloading I have observed that I should set the upload to 80kb when I am seeding i can set it to 100kb and still do light surf the uploading is almost near 100kb and with surfing it drops to around 90kb, probably my modem doe...

when we leeching and seeding various "how to" on the net suggest that we should use an upload setting that is 80-95% of our uploading bandwidth. but I have observed that if I am seeding only I can increases my upload setting to 100% of my uploading bandwidth without saturating it therefore...