agreed.
Telling new carvers to reach their back hand forward always had very positive results for me when I was an instructor. It gets people off the toilet, and it helps people stay with their board all the way around a carve. Newbies typically "open up" on heelside, and face down the fall line once the board comes around. If some people find they are best balanced reaching their back hand forward, and they stick with it, then I don't see anything wrong with that. At the end of the day, it's all about balance.
Besides, it's impossible to twist your hips all the way around to actually face the nose of the board while carving. 5, maybe 10 degrees beyond binding angle, tops. That's the most important part. Whether your chest is turned another 10-20 degrees really can't be significant, imo. I'd say as long as your hips and chest are somewhere between your binding angles and the nose, you're doing alright. Outside that range, yeah, something is amiss.
I'm going to catch hell for posting this pic, but I'd pay money to be in the room when you tell <i>this guy</i> he carves wrong.