Anyone have Squishy Diablos???

I just recently had to get new tires, because I caught a nail. I opted for the Diablos, because of all the good things I've heard.

While they do seem to grab the street like a suction cup, I've noted that after they heat up.. and especially on new asphalt, they seem to get squishy. It almost feels like I'm riding on tires with low air. But I've checked, and I'm not. Tthey seem fine around town. It's mainly when I get up to speed for a period of time. (Heated tires)

Is this normal?

Thanks.