Peter,
This information, I believe, is Cisco documented, but you really have to dig to find it. Actually, if I remember correctly, I thought the same as you until someone else documented this on these forums (where I also find other interesting tidbits from time to time). I then confirmed it by searching Cisco documentation, although I've never actually tested it in a lab.
You're correct, I do have lots of experience with QoS on Cisco boxes and QoS knowledge in general, as I'm often involved in obtaining best network performance across WANs.
Cisco documentation is probably the best, by far, put out by any network vendor. Although, you sometimes have to wade through more than just their primary QoS docs, such as their whitepapers, technotes, and troubleshooting papers. If you do that, you do learn much about what Cisco platforms support, although even then there are some gaps. (I've thought the additional QoS features available on the old 7500s or the FlexWANs or the SIP-200/400 were not really highlighted well. Pretty nice features, as is the new HQF starting with 12.4.20T.)
Again, though, even with all the above, I believe I too discovered this tidbit on these forums.
