Well, it is kind of well-known, but nothing like in Canada. First of all, soccer really rules and overshadows hockey. Second, it was a loss, thus never really trumpeted about. Like the Challange Cup in Canada, or the 74 series. Nobody would ever go as far as calling it the "most important sports and cultural" event of the century. Probably want even make first 20.
Many feel that that was a freakish loss, blamed on an unexperienced coach. Was Tarasov at helm, he would never allow the players to relax and loose concentration as many of them did in Moscow. The Clark on Kharlamov incident is also cited, but few really think that that was the reason behind the loss. And of course, nobody doubts that the Soviet team was superior to Canada even despite the loss. The "Canadian spirit" is not considered to be a factor, as it is believed that the 72 well-trained Soviet team should be beating the slow Canadians even under the spirit thing.