[scott_s]

Correct, but Bram's argument (as I understand it) was that the users would put pressure on the application developers to opt to be background traffic.

[nkohari]

Two nearly-universal truths about users that suggest solutions: they're both rare, and usually wrong. :)

It's more likely that users will state the problem -- such as, "I want to be able to run WoW and BitTorrent at the same time." From there, the software developers would determine the solution (optimization for latency vs. throughput).