I do a lot of reading and have very limited experience. I can tell you that the girl that had the hardest molt last fall and into the winter (in my very small flock of 5 birds) has yet to return to lay. My girls didn't read the books like I did, or they wouldn't have bothered to molt at all...
MamaK, I think the wing feather loss that you are referring to, is when the chicken actually starts her molt. What the author is saying, is that if she looses 2 feathers at a time, she is loosing them faster, and then will grow them in faster, thus returning to lay faster than her slow molting...