Dry performance should never be an issue on any tyre for road use in a saftey aspect as if you are at the limit of traction you are going way too fast. Summer tyres are often optimised for clearing water which means the all season tyres are a compromise in this area esp if they are M&S rated. Predictably a good summer tyre that has good wet performance will be useless on a bit of mud. 2012 TDV8 Vogue (L322)