This could get kind of controversial, but I know with some species of colubrids it can result in picky eaters. There is just no reason to starve (maintenance feed) a Drymarchon for several months, other than it saves the breeder a few dollars in food. If I read the post corectly, a baby indigo grew only 4" in a year while it was being maintenance fed. I realize that snakes continue to grow throughout their lives, albeit much more slowly after reaching sexual maturity. But much of their growth occurs in that first year.
I doubt if there are studies to support this; it is anecdotal, based upon conversations I have had with others and observations I have made. I am sure the breeder disagrees with me. But ask yourself one question. Why would you "maintenance feed" for almost a year? Gotta be just one reason.