I saw an analysis about this a few years ago where they showed that the wait time for care in Canada was generally less than the wait time in America for most stuff.
Certain things like non-emergency (but important) surgeries could take longer to schedule in Canada.
But that was years ago. Probably both sides have had changes since then.
The most important takeaway is that if you think wait times would definitely be worse with socialized medicine, you have fallen for conservative propaganda, you idiot.