Ontario is awful for left lane hogs. I agree with what this officer is saying. On multi-lane highways in Ontario the signs say:
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It doesn't say anything about the speed limit. You aren't entitled to be in the left lane just because you're traveling at the speed limit. If cars are lined-up behind you, you are the slower traffic.
I doubt the OPP is actually stepping up enforcement to get people out of the left lane though.
The police aren't actually going to tell you straight-up that it is okay to speed. The speed limit is still the speed limit, and if you get caught by a cop's radar while passing you are still liable to get a ticket. This whole discussion applies when you're on a multi-lane road and "the flow of traffic" is speeding, in which case they're not going to pull anybody over unless a vehicle does something else sketchy that catches their eye.