I too would like info like this. Autodesk's minimum requirements are clearly designed to not exclude any more machines than absolutely necessary, thus maximizing sales. And it's damned hard to find actual benchmarks using AutoCAD. It would be immensely useful to know whether scarce upgrade dollars are better spent on more cores, more clock speed, more graphics card power, faster hard drives, or more RAM. I realize that this is extremely hard to quantify, but an honest attempt would be nice. A downloadable set of sample drawings of various sizes together with a table of times for some useful features would be very useful.
Autodesk working with computer enthusiast sites, making sure that they have copies of Autodesk software and know how to configure it (and have sample drawings) would also help immensely. These people have expertise in testing everything PC and don't have to worry about upsetting a vendor. As it stands, specifying an AutoCAD station is largely a matter of making a semi-educated guess through clouds of FUD.