Yes, I think you may be right. They're supposed to touch their backs to the heat plate. In her photo, the chicks weren't touching it... if the room was warm enough that could be okay, but it's been cold lately, at least where I am...I’m super new and just hatched this week, but I just wanted to add that I was planning to get a heat plate but found multiple threads with casualties from heat plates with quails because it isn't always close enough to warm them completely if the room wasn’t kept very warm also.
I’m sure they weren’t all runts or difficult hatches.
for me it seems the hatching is the “easy part” i’ve beat my head against the wall trying to figure out the “survival” my PF hatch for example.....I left DH and fam in charge of the brooder for 24 hours to accompany my Dad to a dental appointment and returned to catastrophic losses.....the losses continued following my return and moving them to larger brooder......I ended up with only a handful (approximately 1/3) making it to the aviary......