Exactly.
Swarming is a real useful function:
If every Gnutella user would share ALL their downloads
but limit their uploadbandwidth to 10% of the whole bandwidth we would be in heaven

If someone has an ISDN connection (like me) but limits its
upload bandwidth to 1 KBPS its too slow.
But if every ISDN user would do the same and you
download from 12 users at the same time you would have
12 KBPS. Now be aware that there arent just ISDN connection but, DSL, Cable and T3 which have even a higher bandwidth.

I persuaded a friend who has DSL and was freeloading to
set a uploadlimit of 10KBPS. 10KBPS are ok for uploading (imagine multiple downloading from 12 hosts using around 10KBPS!) and the DSL user doesnt notice much from the occupied 10 KBPS (it doesnt slow his traffic down.)

So please, please share!