Can't find the article, but a BMW product manager based in Bavaria made that idiotic statement, and I for one was idiotic enough not to think it through. The editors were also idiotic for not questioning him further. It was quite a diatribe on "don't change from your OEM RFTs." And he specifically mentioned the car being "set up" for them, not just the "safety" factor of not getting stranded.
Still, I would love to see one of the mags who have professional drivers on call do a real test on a track, skidpad, etc. and put the issue to rest, if possible.
Obviously, a dedicated summer tire will always handle better than a RFT or A/S. Whether it's a world of difference is what we want to know. The consensus here seems to suggest a "marked" difference. For me, that is not the ability to go from 8/10th to 10/10th, as I don't track. But steering feel, wet traction, general grip, that gets my attention.
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