Yes I think it is, Hoodoo. My Dad was at his peak in the early to mid '70's, and that's when he was doing expeditions in Afghanistan and Peru. I just asked him, he says when they'd plan an expedition, they'd all go down to Seattle for a day or two (quite a trip when you live on Vancouver Island) and spend a few grand at REI. I believe that REI might be where my Ventile anorak originally came from.
Now, MEC was originally a mail order catalogue, and it's first store didn't open until the latter days of the '70's. It was originally on Broadway Avenue in Vancouver. I believe I got lost in the store when I was quite young, freaking my parents out to all hell and back. (They're huge stores) But, sometime in the last ten years or so, MEC's Vancouver store moved to another location.
And sometime soon, they'll have one in Victoria, our provincial capital!
Cheers,
Adam