I just drove the Sea to Sky highway last week in our VW and that road deserves a 100kph limit the whole way. 80kph is insanely slow and the road limit tops out at only 90kph. We were doing 80mph in our tuned Tiguan. Those Porsches were pulled over for the money, not the safety.
I was going to drive my M up there in September but this might make me change my mind.