At least in Canada anyway. I guess US with the lower minimum wage would lean higher.

Canada (Google says it's from 2008, Wayback goes back to at least 2013)

Our good friends to the north have a very similar tipping procedure as the United States. Most service people expect a 15-20% tip depending of course on what part of Canada, which city, and the level of service.

In restaurants, 15% is considered to be a good tip but of course, if the meal is great and the service is too, feel free to tip more! Make sure to tip in many of the same establishments as well – restaurants, bars, barbershops, taxis, etc. www.gonomad.com/2309-a-guide-to-tipping-around-the-world