I didnt read the article posted above, but as far as moving the hen and chicks goes, I think it depends on your flock, and your hens place in that flock. There are a lot of variables, and for safety's sake, I move the hen and chicks.
Sadly, I have had super hens leave thier nest to protect a single chick that fell to the floor, causing the remaining eggs to die. and vice versa, a hen stay on the eggs, while the chicks fall out and die.
I have had hens picked at till bloody by other hens who can hear and want the chicks, or chicks taken out from under a hen. And I have had hens that get so protective they drive everyone else out of the coop completely!
They are peculiar creatures, and as variable as we are, so to make it easier on everyone, I put the hen and her chicks in a 'hatching hutch'. These are modified Rabbit hutches that give them a quiet dark back room, and a sunny open area for mom to teach and feed the babies. When everyone is 5-7 days old, I open the hutch, give them a ramp, and let em go! she will lead them out and back in at night. Tho sometimes you have to help the chicks figure out the ramp for a day or two.
Later, when she is ready to 'wean' them, she goes back to the coop, and the smart chicks go with her, the others go into the hutch, and I have to move them for a couple nights till they get the idea.
Good Luck!