MumofThree, I remind my DD that she is free to draw however she likes when drawing for herself, which of course is 98% of the time. But if she's choosing to make something as a gift for for someone else (her choice), then I do point out that when we make something for someone, doing one's best work shows that we really want to give them something special. I am okay with saying, "Hey, is that your best work?" in this situation. YMMV, of course.
Re this:
I guess the question is assuming no disabilities or special needs, would most kids evolve their grip over time to something that works for them.
I didn't read the article posted above. I will say this, though. DD has beautiful handwriting and incredible fine motor skills--however, her grip is not really "right." I have gone back and forth about whether this matters. MY grip is not right--it's really not right--and I can't write longhand for more than maybe 10 minutes without significant discomfort. One can argue that this doesn't matter, and in fact it matters very little to me as an adult...but most kids can't keyboard all their work at school (yet?) I don't know. It caused me some trouble in college.