My skinny bass grow too. Really well fed ones (like DD's proverbial LMB that can go to sleep hungry and wake up full of forage) grow faster than yours or mine.
I figure instead of, say, 1000 hungry 9-inchers, you now have, say, 600 hungry 13-inchers. Progress.
SOP is, IIRC, adding new genetics after you beat your existing surplus down most of the way. Makes sense to me.