I very much prefer Artist Point. I've eaten at the California Grill three times and I did not enjoy myself. The food and service are excellent but I can't stand the atmosphere, mainly due to the behavior of other guests. Due to the fact that California Grill gets hyped in Disney publications as THE place to watch the fireworks, it's mobbed with poorly behaved children and worse-behaved adults. It's the one place on property where I really agree with the idea of the "Walmartification of WDW," not because of anything Disney does wrong, but because of the way other people don't know how to behave. I'm not in the mood to eat $40 scallops while a sweaty man in a sleeveless shirt and basketball shorts ignores his kids rubbing their faces on the windows and his wife plays Candy Crush on her smashed-screen iPhone.
No, I'm not exaggerating. That's been my experience on three separate trips.
This is great information. I'll look into that if we ever decide to take the plunge again.