Sorry about the thread bump-age. Gotten a GoPro now so I've been recording my time behind the wheel. Here's these tires in a mountain drive:
The DWSs are plenty grippy enough for my needs in the dry, as you can see... I don't think I would be much faster in summer tires there, and I might not want to be.
Snowed for about 3in tonight, though, and had to get to a wedding banquet and back. Here's the result:
Fine in powder, fine to manuever, fine on flat ground even when stopping or starting, but unfortunately not fine having to stop on a hill, then start off again on packed down snow -> ice. Good thing I was only 2 blocks from home, so I was able to park properly (no stereotypical abandoned BMW here!), walk home to grab a shovel, clear out a 5ft patch behind my rear wheels, back up, and get going. Once I got to the unplowed and sparsely-travelled side streets, no problem at all, even stopping for stop signs and going up hill.
Both videos, all on the same tires!