Well good luck. I kind of gave up on that after hearing the (IMO) absurd pet theory about prop disc drag and throttling issues being the end all of turning issues.
Yes, I'm also quite vehement in drawing the distinction here that, while a prop disk at speed will resist rotation - both due to the prop alpha effect I described and due to rotational inertial effects (this is also in play at zero forward speed, not so the former), Gaston has yet to show anything that says that the scale of that torque is anything like significant or, indeed, that even if it is, that such would make any diff, the effect being present in all the a/c, subject to local differences in prop design. Indeed he says as much when he contends that the off-max turn of the Spit will still best the 190, like setting versus like setting. Or, am I missing some assertion he might be making regarding the lower pitch inertia of the 190A? If so, I'd say, "plausible" but that's not going to help overcome the disk effect, which is a torque and will need to be counteracted regardless of source - thus demanding more pitch torque from the tail surface - not something easy to come by in a "close-coupled" (read, short moment arms) a/c.
His contention on the rest, however, is more clear. He's stating that the 190 a is a better turner at mid-speed off-max than the game credits - yet I see no analytical or test evidence for this assertion - though there is some anecdotal evidence presented. He goes on to dismiss what I feel may be the real turn strength of the 190A - instantaneous turn rate. We are already well-supplied with evidence that it's roll rate is stunning.
We need more clarity around his point and, most of all, we need a way to test the hypothesis. That's the only way we'll ever finish this thing.