Thanks a lot, NWIFlyer! That's really helpful information!!!
I have now booked a flight with Air Canada from Toronto to Las Vegas and a return via Montreal for October. The lady on the AC phone was kind enough to book me in booking class V, which should give me 100% of the miles according to the Aegan table.
According to this calculator, this should give me 4483 miles
http://www.webflyer.com/travel/mileage_calculator/
So I should reach Gold Status under the old rules
Or did I miss sth else?
Enjoy your weekend & safe travels,
Martin