Thank you. :-)
Yes, it's important to remember that torrents use part of the upload capacity to acknowledge packages received, and "shake hands" with the other peers. That means, if your D/L speed is significantly higher than your U/L speed, you're not going to get full use of it. Not with BT, anyway.
On the other hand, I'm on a 2Mb/2Mb line.... :-P
I've been thinking of upgrading to 6Mb/6Mb, the price differential isn't that great.