He has supposedly talked about it on an old episode of reptile radio, but I haven't been able to locate it. Never really made much of an effort to though either.
And you are right it could be some type of fluke who really knows.
I guess my big thing is calling them lethal combos when they really aren't.
There is no evidence that any one of the pairings being discussed is a lethal pairing where messed up hatchlings are produced that don't survive or you end up with eggs going bad or hatchlings dying in the egg.
That to me is what a "lethal" combo really is.