Interesting isn't it. Person A has tyre Z, and considers it the best ever fitted on the car, there for, it must be the best tyre in the world and there can't be anything else worth considering.
Right?
Is that really what we're saying?
Of course it depends on the individuals needs. And experience.
A good tyre means many things to many differant people. If I recommended sc3 over f1 you'd complain of noise. If I recommended rt over sc3 you'd complain of wear. If we then went back to f1 you'd say where's the grip gone?
But as the advert mentions specifically to grip levels. I can definately tell you there are better available. As cem says you mostly know those tyres by now. Dunlop rt and ac3 mo. BOTH of these have more grip.
... However they do have other downside, relatively speaking.
Anyway. Point is, they can't be maximum grip tyres if there's tyres with more grip available. Good tyres all things considered but there's better available and the ad is slightly misleading.
You can do a hell of a lot worse than f1's too of course.