I think its a stretch because not all markers prove to be true. And not all hets have them. Like I said before I have seen 100% het pieds prove with zero markers and I owned a 100% normal that had perfect het pied track markers and a head stamp! They just aren't accurate that's all. If I gave you a clutch of 8 50% het clowns do you feel confident you could pick out the hets based on markers? Same with a clutch of 50% het pieds? I could pick out the ones with markers but I wouldn't put money on them proving or the ones I didn't pick not proving.