Maybe, but I doubt that. Carpinte and Texas Cichlid were forced to mate a lot of times is due to "no choice" situation. If there was a male carpinte for that ripe female...who do you think the female will choose, Carpinte, the TC or the Salvini? IMO, I think it has a lot to do with sexual evolution. A female rather looks for a mate that can give her great looking kids....stronger...and be able to survive and etc. Maybe, the female Carpinte didn't see what the Texas Cichlid could provide for her and her off springs.
I'm not saying that they (TC and C) can't and don't breed. I'm saying that in nature they don't do so easily (almost impossible unless interfere by human). And in tank only because they were being put in the situation...if there were only Carpinte and Texas Cichlid and no other fish.
And honestly, why would we want to breed these fishes together? Why can we try to keep them pure? And I'm sure many people out there are looking for pure breed trimac (FH was mistaken as Trimac), or Midas, or Red Devil, or other famous fishes.
Like my Carpinte, she is pure breed. And I don't plan on breeding her with a Texas Cichlid. To do so, possibly will cause the next generation...pattern and color not as great. And I have planned on getting another Carpinte from Jeff Rapps to breed this beautiful specie, 'Escondido'.
As for the article, was Dr. Loiselle supposed to state every case he witnessed? Or was he supposed to conclude from his observation and experience? He would not state all that if he didn't have enough data to support his theory.