100% untrue. In the 16 years I've been keeping chondros, Sorongs and Jayapuras have had the best temperments of all of them, other than some of my designer bloodlines. Yes it's true that genetics can play a roll in behavior, but until you've owned 20 Biaks, you can't tell me locale has nothing to do with personality.
In my experience, Biaks and Arus are the most defensive of chondros. Sorongs and Jayas, even WC animals have been very calm for me.....same goes for Kaufia/Canaries.