It seem's like the following chart from Cisco Visual Networking Index: Usage Study might be a source of the oft repeated claim "A tiny fraction of the population is using a lion's share of the usage."
I'm not sure if this is the source material for the Canadian claims being made, but it shouldn't be.
This table is talking about global internet usage and if considered for a moment, makes alot of sense.
I bet if we considered the speeds offered in different countries as well as penetration in those countries, corrected for the popultation of said country, I bet all we would find is that the table above only tells us "the Japanese, Sweeds and Koreans are using the interet much more than the rest of us."
But in the meantime, does anyone have a source for Canadian usage statistics? StatsCan, as usual, seems to be of little help.