The authors prefer Standards track. Will Leland expressed the opinion that Informational would be less useful, since the intent is to promote consistent implementation and experience. There was also concern that this draft only covered delay, and not loss or delay variation. The authors felt they were both covered, but perhaps this could be clarified. He will take up the issue on the mailing list.
Implementations are preferred, however.
It can die at proposed standard if there is no implementation. The chairs will discuss it with the ADs. This comparison is a preliminary empirical comparison. The framework draft and the TReno draft have expired. Mark's work suggests the framework is pretty good, so he will make minor revisions and resubmit for working group last-call.