The link you have is from the Canadian AARP. That's like going to Walmart and asking if they are better than Publix.
Aaron E. Carroll, M.D., the director of the Center for Health Policy and Professionalism Research in Indianapolis, identified the top myths about the two health care systems.
Perhaps you should take a look at that map again.
That being said 2 things.
The Scandinavian countries are not "socialist". The
prime minister of Denmark has repeatedly lauded this. In fact, in more ways than one, they are even more capitalistic than the United States. They have expansive welfare systems that much is true, but that does not qualify them for socialist alone.
Secondly, Universal Healthcare does not suffer from wait times because Universal Healthcare. My Father pays for his own insurance and has his own doctor, but still is a month long waiting list to see her. In addition, the Canadians made a conscious decision to only spend so much on healthcare. If you compare it to say, France, you'll see that the French health system by comparison is much better prepared to deal with greater influx of patients.
The simple fact is that if you have more patients than doctors/specialists, there will be waiting lists regardless of whether you have Universal healthcare or not. It's simple supply and demand. The difference is that in a Universal system, you'll eventually get treated, whether you can afford it or not. Each system "rations" healthcare if you want to put it bluntly.