Well to each his own. I find most of the Molson ads lame, pointless ...
In the first ad the woman appears to have healthy teeth at the 12 second mark and later on she has bad teeth like I've never seen on any even moderately attractively woman. So what the point of the ad ? I went in a store in Vermont where an attractive woman had bad teeth so lets drink some Molsons? Ahhh, OK.
The second one is the double entendre on beaver that I first heard when I was maybe 8 years old. Hee-haw, what a knee slapper.
Hey, crack open a Molsons and I'll tell ya the one about the chicken that crossed the road while we're at it.
The best "I am Canadian" bit I've seen is not from Molsons, its a French-Canadian parody of those commercials produced by much sharper writers..
"I am NOT Canadian"
http://www.youtube.com/watch?v=TncdhLGjFTE