Who is in Charge of IPv6 Packet Priority?

OwenF asks: "Here's a question. IPv6 is well on its way to becoming the next Internet packet routing standard. One of the big "features" many proponents of IPv6 enjoy pointing out is that IPv6 packets will include "priority" and "discardabillity" info in their headers. Right now, using IPv4, packets are shuttled across the net on a first-come first-serve basis, and when network congestion gets too high, servers start dropping packets, also on a first-come, first-serve basis. With IPv6, however, packets can be encoded "Top Priority" and/or "Do not discard" so that they recieve special treatment at the hands of the routers. What I want to know is, who's going to have control over these header flags? Can I make all Web server's transmitted packets "Top Priority/Do Not Discard," or is this just another way for big-name commercial web sites (e.g. those using streaming audio) to take more control of the net and force other user's packets into digital heaven? "