With the exception of celebrities and politicians (our royalty?) you don’t really get preferential treatment based on your ability to pay. (in the US)
If MedPundit really thinks that insurance doesn’t get you any preferential treatment in the US, she’s totally jumped the shark. Newsflash: Getting treatment at all is preferential treatment, Dr. Smith.
And more to the point of her post: people die on waiting lists all the time in the US, too. And Canadians requiring emergency care get it.