Also, some historical quilts are divided into three sections at the foot of the bed allowing for the two posts there...left side drop, bed width, right side drop.
regarding "crinkling"...... I think just another currently created term, brought on by the fact of "washing after completing", just as now using printed fabrics for backs, instead of muslin. For those history buffs....other than utility quilts, where anything available might have been used, what was the usual backing of a "good" quilt?