You seem to have already decided for yourself, which is okay, but in case you do want to know...
The section you have quoted is referring to the CMTS port which serves multiple subscribers and could have typically anywhere from 30 Mbps to 300 Mbps of downstream "bandwidth" and 8 Mbps to 100 Mbps on the upstream side. It further goes on past the quoted section to describe the conditions that will cause the CMTS port to be considered in a state of near congestion. Also a bit further down beyond the quoted section also describes the critieria for an individual subscriber to be considered in a state of extended consumption.
The CMTS port needs to be considered in a state of near congestion AND the subscriber needs to be considered in a state of extended consumption for anything to happen. Even then, what happens is the subscriber's traffic is given a different priority while BOTH conditions continue to exist. The new system does not use any sort of RST method.
Regardless of how you feel about any kind of network management, what you should recogonize is the approach used to implement this system is completely different than the other approaches Comcast has used in the recent past. They have published, in advance, both general and technical information regarding the system and the change. They have also sent an e-mail to all (HSI?) subscribers informing them that a change is taking place and also directing them to the previously published documents. Your statements about Comcast employees discussing the change or the new system is unconditionally inaccurate - they have discussed it publically here, the Broadband Reports web site and other locations on the web.
And, for what its worth, the only thing I am aware of that they have used any sort of "RST technique" with is BitTorrent transfers.
