No statistical input either way, but curious about the reproduction rate of maggots? I have a small tank set up (recently) of meal worms and I agree that the process is relatively slow (most of the worms are finally beetles after a month or two maybe?). I may have meal worm larvae in there somewhere, I've not dug around to see really and just waiting to see worms again whenever they emerge (if ever). Admittedly, this is my first batch of meal worms and more of an experiment for my 5 year old bug enthusiast than actual production facility (we only started with about 50-100 meal worms). I know that in the same amount of time, my hissing cockroach population dramatically increases.
In an established colony under controlled temperatures and feeding, the amount of hissing roaches one can get is amazing really. They grow fast to boot, so in the same amount of time that the meal worms took to transform from worm to beetle with no visible offspring; I've passively added over 100 hissing cockroaches. They bear young about every 60 days (around 30-60 or so per female). From my colony, when I actively control feeding and temperatures, I can easily get a yield of a few thousand every 60 days (from current breeders, obviously with cultivating a massive breeding push, the numbers are limitless). I think the maggot set-up is disgusting and can't envision ever using it, but curious on the math of it and how much yield one gets from the method?