Well, there was some work that was done by researchers with the Canadian Health Policy Institute, which is a health think tank. They did a survey of drugs in 2012, and of the 36 new drugs that were approved by Health Canada, 92% were covered by at least one private drug plan in that year, compared to only 11% that were covered by at least one public plan.
In terms of time, the private drug plans took about 143 days to approve a new drug on average, while the public plans took 312. That's significantly faster approval of new drugs than the public plans managed to do.