When I was in driver's ed in high school in America, there was a push to teach 8 and 4.
As far as I am aware, teaching students 10 and 2 has long since been phased out supposedly due to the increase of arm injuries in the event of an accident. 9 and 3 wasn't recommended to us because if your air bag deploys, your right arm will smash into your passenger or the passenger air bag. 8 and 4 is supposed to be safer but it comes with the caveat that you have to steer your car a specific way.
That being said, I prefer 9 and 3 and it's hard to find drivers in America that don't use this position as their default.
As far as I am aware, teaching students 10 and 2 has long since been phased out supposedly due to the increase of arm injuries in the event of an accident. 9 and 3 wasn't recommended to us because if your air bag deploys, your right arm will smash into your passenger or the passenger air bag. 8 and 4 is supposed to be safer but it comes with the caveat that you have to steer your car a specific way.
That being said, I prefer 9 and 3 and it's hard to find drivers in America that don't use this position as their default.