I have seen a few strange things about lepomis ( BG , HBG, RES, GG )stated but never seen CNBG described as anything other than a
Florida subspecies of BG. They are not hybrids and in all the studies I have seen have normal M/F ratios and spawn like regular BG (no 80% female). I wonder if the website has a mistaken write up or if something else is at work.

I have posted before my approach to buying fish " ONLY REPUTABLE HATCHERIES THAT I TRUST & KNOW , WHO HAVE SOMETHING TO LOOSE AND I CHECK BEHIND THEM WHEN THE FISH ARRIVE" I will find and post data on CNBG.

Texas Pub.
http://www.bio.utexas.edu/courses/bio354l/projects/1998/Patina_Mendez/Lepomis_macrochirus.html

Three subspecies of L. macrochirus are recognized, however specific geographic boundaries are not distinct to separate them. L. macrochirus macrochirus is usually found in Arkansas and the Red River drainages that include Oklahoma, Texas and Arkansas. L. macrochirus purpurescens resides in peninsular Florada and the Atlantic Slope. L. macrochirus speciosus is present in West Texas and Mexico. All of these species integrate with each other and sometimes are not distinct subspecies. The distinguishing character which sets each of these apart aside from color variation is the number of anal fin rays present.L. m. purpurescens has 12 anal rays, L. m. macrochirus has 11 anal fin rays, and L. m. speciosus has 10 anal fin rays. (1