As a left handed writer the scrunched over doesn't come from any "type" of lefthandness. I learned to write that way because writing normally with your left hand means you smear the pencil lead and/or ink with the edge of your hand if you're writing left to right. So to avoid it we needed to twist our hands up and around.
When your paper is turned to the 2 o’clock position, your hand doesn’t smudge anything because, just like right handed, the hand doesn’t touch the ink. I’m left handed and have never had the smudge problem nor do I have to scrunched or twist my hand over. Hubby is left handed, too and he doesn’t scrunch over either. People may go for years before realizing we’re lefties.