They are all 2 seat sports cars. Only the Mustang is an outlier, and that's because Ford doesn't have anything closer.
I have a feeling Toyota has setup the Supra's gearbox to excel at 0-60 runs. From a rolling start, I'd imagine a C7 Corvette would freight-train the Supra. Additionally, all the other competitors (except the Alpine) have models or variants above them in performance and price. Meaning, for instance, Porsche is not going to go out of their way to make the Cayman S dash to 60mph in a surprisingly fast time, because that makes the argument for the 911's higher price a little tough to explain. They've geared down or otherwise created space between the Cayman and base 911 since the beginning. The same is less true for the others, but I think still valid. The Supra, on the other hand, can be rated as optimistically as Toyota wants without fear of jeopardizing sales on any other models. A 7AT Nismo 370z should be just as fast in the real world, I would estimate.
As an aside, the whole 0-60 test is years beyond usefulness. It should be replaced with something more telling of the driving experience. Like initial 10 second average accelerative force in Gs. I doubt very many people care specifically how fast their car gets to 60mph, they care more about how fast it feels. It's not just a semantics thing either, it has genuine negative effects. The manual transmission is it on it's deathbed and one of the reasons is that manuals are slower to 60mph. They don't feel any slower (all things equal) in gear during acceleration, but they suck at this test. Also, manufacturers really try to game the 0-60 test and will gear their cars to get the fastest time even if it means the car isn't geared very well. Take the 86/BRZ. Prior to the facelift, the rear axle ratio allowed for the car to hit 60mph in 2nd gear. But that meant it felt undergeared in most driving situations. The facelift brought with it a 4.3 rear axle ratio. Presto, the car feels like it always should have, punchy in the 20-40mph range. But now it will only hit something like 56mph in 2nd gear, which means it looks slower on paper! It doesn't matter if it's faster to 50 AND 70mph, because the arbitrary 60mph target is king. If you accelerated the car from a standstill to it's top speed, and then averaged out the acceleration forces at 10 seconds, 20 seconds, etc (or whatever) it would be apparent that the new car FEELS faster, even if it hits 60mph in a longer mount of time. #endthe60 #rant