I only got 5K miles out of the original D220 rear. I was down to the wear bars (center and sides) and cord was
just starting to peek through in the center in one spot. NO burnouts or skids. I weigh 190lbs. and I check my pressures religiously before every ride (33F/36R). I replaced that original rear with another D220 and by around 8.5K, the original
front D220 was totally shot on the sides (center was fine). The newer rear still had a good bit of meat on it, but I hated the way the bike was "falling" into turns because of the worn front - so I put a pair of Pilot Powers on. They've only been on a few hundred miles so far, so the jury's still out on them as far as wear goes - but I don't expect them to last as long as the D220's. That's OK though - because they absolutely ROCK (as has been discussed in many other threads on here and all over the internet). I may try Pilot Roads or Metzeller Z6's next if the Powers don't last long at all. We'll see...
I obviously ride aggressively - in the turns and with the throttle & brakes in general. Many of my miles are from "spirited" riding while chasing my co-workers (R6 and Tuono) around the NC/GA/TN mountains. I have tried not to engine-brake as much when rolling to a stop since that first rear - so maybe that'll save the rear a little - I don't know. I don't commute on the bike anymore (did for the first 3K miles or so) so no more "easy miles". Now, if I'm riding, I'm looking for twisties and just enjoying the bike. I suppose I
could try to be smoother on the throttle inputs - but one of the things I enjoy the most is pinning the throttle WFO when ripping through the gears - or nailing it when coming out of a turn! It's like a drug. I'm sure if I putted around & took it easy all the time, my tires would last a whole lot longer, but then again - if I wanted to ride like that, I would have bought a cruiser.

I consider tires just another price you pay for fun. Tire wear rate is directly proportional to the amount of FUN you get out of them - and I enjoy the heck out of mine!
Obviously, if your bike is a high-mileage daily rider/commuter/tourer, this mentality would get expensive real quick - so you'd be better off with harder ST tires - and trying to take it a little easier on them - but that's not me. Which tire is right for you depends on your personal situation.
I'm doing my first track day in October ;D - so I'm going to try to keep these Pilot Powers in good shape until then.