Since somebody bumped this thread, the final report on my Anakee IIIs: Took the front one off at 11.6K miles. At that time it still looked like it had about 1K left before it hit the wear bars, but it had worn in an odd trapezoidal cross-section that made it sometimes surprise me in corners. And I wanted to see if my K60 Scouts would work better on gravel--I had just returned from a ride around Iowa on gravel "scenic roads," and the front end skated around like crazy.
The rear Anakee went 13.6K miles and still had about 1mm before the wear bars when I replaced it. Also, it still hadn't squared off in the middle. Don't know if it's a dual-compound tire or if they use some kind of variable temperature curing process, but I was quite happy with its wear.
The noise was horrible, of course, I think because front and rear whine at slightly different frequencies and this produces that "wah-wah" sound. And I can't really see the point of the A3--on pavement, it was a decent enough street tire (except for the noise), and on dirt or gravel it seemed to also be a decent enough street tire (that is, I can't say it was any better on dirt than a pure-street tire would be).
One other interesting thing about the Anakees: they seemed to prevent rain. Not once during the time I had them on the GS was I caught in rain. Not that we didn't have rain, it just never rained on the GS. Magic?
FWIW, I ran Heidenau K60 Scouts through the summer, mostly on pavement. On gravel and dirt roads (not that I did anything particularly challenging on them) they seemed pretty good, definitely a lot better than the A3s. But above 70mph they just shrieked, the back was square from the factory and just got squarer, and the front wore in a sawtooth pattern (the part of the tread block that was leading edge under braking wore about twice as fast as the other side of the block). I think they might have had about 8-10K on them when I replaced them with Continental TKC 70s for the upcoming trip to Moab, Bryce, etc.