It's difficult to determine the issue without knowing what the guy was running on pressure and alignment. Zooming in you can see the middle valley appears to be shallower than the other two indicating over pressure. But it also looks like more wear towards the inside of the tire which is too much camber. However considering those are PZeros it could be from a loss a traction. I had a similar problem with fronts when I first tracked with the stock alignment and tire at our local Autobahn track. It's a euro track with lots of turns and I was pushing hard all day. The fronts had considerable wear on the outside and looked the opposite of this picture. In my case not enough tire on the front and too little camber. I ran 32 pounds.
But regardless this is why it's good to take tire temps after a run to make sure your setup is right.
Hey T, doing fine. Waiting for this white stuff to leave us.