Apoth
Double Eagle Member
Not all discs have high speed turn. Firebird, Predator, Wizard, Ridge, Roc, Teebird, Stalker...just to name a few. The fade is the problem. You need a disc that you can power well enough to keep straight for a long time, but you won't turn over. The effects of fade can also be minimized if you can keep your throw close to the ground, but some shots won't allow that.
I don't know that I entirely agree with this. My Wizards, Teebirds, and Stalkers all have high speed turn. Not a lot, mind you, but some. Every one of those discs I have to throw on some level of a hyzer angle in order to get them to flip up and fly flat. That indicates to me that they have some level of negative HSS, they just take a bit more juice to reach that point.
Virtually every disc will exhibit some level of HSS stability when thrown at a certain speed. Hell, even the Predator does it. Case in point is Robbie Bratten who uses an ESP predator for his long distance shots of 500+ feet. That disc S curves like a Surge even when thrown on a hyzer angle for him.