If I asked Kenny what his "most stable" disc is, he's going to tell me Firebird and not Teebird. I'm not using this to prove right or wrong, just to prove that there is more than one accepted way to describe discs with these terms. If someone called CDGS and said they wanted the most stable driver we have, and we sent them a Teebird, 9/10 people are going to be pissed.
True zero turn zero fade discs don't exist. It takes a thrower with good form to make a disc fly anywhere close to this ideal. However, anyone can throw a really understable disc and have it turn right, and throw a really overstable disc and have it turn left. That's why I don't use the word stable to describe a disc that flies straight for me. More stable means more resistance to turning at high speed for me. Although I do usually try and be more specific and say HSS and LSS.
True zero turn zero fade discs don't exist. It takes a thrower with good form to make a disc fly anywhere close to this ideal. However, anyone can throw a really understable disc and have it turn right, and throw a really overstable disc and have it turn left. That's why I don't use the word stable to describe a disc that flies straight for me. More stable means more resistance to turning at high speed for me. Although I do usually try and be more specific and say HSS and LSS.