I found the GSD's good too but only once warm, they hated the cold and not winter either, i mean just cool mornings especially in the wet.

Had the worse wheelspin ever from my venerable MB on those until they'd got warm say 5 miles running, plus they'd develop serious flat spots overnight, would take about 2 miles for the tyres to get round.

I ended up removing them at 5/6mm and selling them on.

My sons best mate had them on his highly modified Cupra, he gave up fighting the violent torque steer and wheelspin when cold, he changed makes too.

Those wet grip scores referred to by the OP, i'm none too sure about them, tyres i know to have excellent wet grip having the same B or C mark as some ditchfinders i know to be lethal doesn't compute. Think i'll continue to take more notice of the various european tyre tests when they include tyres i'm considering, plus the user results found on Tyretest and Tyre Reviews etc...all read with an open mind wary of possibly tainted posts for one reason or another.