The modern tough guys with just one flexed right arm on the top of the wheel at all times, literally can never cross arms, the left arm is always rested.
I haven’t analysed my own method, probably a relaxed 20 to 4?
The by the book 10 to 2 is ignored by everyone other than anoraks who’ve proudly passed the Advanced Driving Test.
The modern norm appears to be a lone tattooed arm at 12, with an unnatural flexing of arm muscles.