I was just there on Saturday and up at Mt.Tremblant on Thursday. Saturday was great, love that track! If that white 1M had Quebec plates it was probably Guy, he's 100% stock on the engine and pretty sure everything but tires are stock. Ah I see you are in the instructors group, yup i'm sure that was Guy then!
Me doing a bit of passing...
https://www.youtube.com/watch?featur...&v=vk3GqcpHwI0