I think we're all pretty much in agreement that proper tire traction in winter is not helped by low pressures. In fact, I firmly believe in tire pressures that approach (but not meet or exceed) the max sidewall pressure listed on the tire.

The only negative about high tire pressues that we should be aware of is accellerated suspension wear. This may affect shocks, springs, control arms and joints. Other than that we may get a noticeably harsher ride which is something for each of us to decide on what pressure value is more bearable.

Cheers;

MSantos