Ok...that makes sense and yes, I've heard this before. I really like this guy's tire (or should I say tyre?) reviews/channel on YouTube. He mentions in this video that he really can't believe they don't get the Michelin Pilot Sport All Season 4 over there b/c it's so good. His review videos are very good. Folks that talk smack about all seasons "no seasons" etc.....I really think most folks would be pretty happy with the PS4 all season as a single tire weapon in many parts of the U.S....heck...I tracked it and it isn't really that bad, just doesn't handle lap after lap heat that well but I had a blast on it when I first started doing some track days before I was commited to a second (and third!) set of wheels/tires (summers and 200s). If you can't send it hard on a public road hard on these I'm not sure what to say - it comes on the base C8 Vette. Does that mean it's as good as a summer for dry grip? No. Does that mean it's a great tire if you live in North Dakota with a real winter? No. But for the middle ground it's killer. I could ditch my summer setup and just use this and be happy if needed. We don't really get much snow here in the Richmond, VA area but I've had them in a light snow/snow on the road with no issues as well.
I watch this guy's channel too, although admittedly only summer and winter tire tests usually. It's kind of funny he's complaining about not getting the PS4AS because they get so many more new tires than we do it's borderline stupid. They're on something like the GoodYear Asymmetric 6 and we're still on the 3. They have the ContiSport Contact 7 (class defining performance in its last test) and we don't even get it because the have the North America specific ECS... Etc etc. Plus if you convert the pricing from the GBP he usually uses, tires are dirt cheap over there.