Seen a few. It does make noise, and I'm so-so about that. I hate it when a car is not as fast as it sounds, but I geuss the Supra does make "the cut", especially now.
C&D did a dyno test. According to that Toyota really did add more power. I was unsure if they upped the rating on just paper because of the original dyno results suggesting it should have ~380hp crank. But now it's actually at the wheel.
388whp @ estimated 15% loss = ~446hp at the crank. With that engine and a turbo, it's not really a surprise they could just do that. I guess nice for who wants that power with a warranty.