I would venture a guess, that politics plays a bit of a role in this as well. The application form is written and legislated by the province. It asks for the date first licensed in Canada or the US. I find it strange that a person from Russia gets 0 years credit while an individual from California gets full credit.
If it's February and I have to get into a vehicle with one of those two drivers, I'm going with the Russian
And hope you don't get pulled over for DUI? lolol.