I missed this conversation back in August, I was sort of unable to respond, but reading the all this I decided to throw in my two cents worth. I just completed a complete re-work of all plane maneuverability ratings. I used the data from a flight sim game called "IL-2 Pacific Fighters", which of course has its own sub-culture like most games that develop after market tools and aids. One of those "aids" is called IL-2 Compare, which has plane specific data, to include best speed at all altitudes to best turn rate. (There are several versions of Compare, as it is updated each time the game is. For this I used IL Compare 3.01. The newest version is 3.04 which I did not have on my laptop.) If you fly, you realise that manueverability is more than turning and never really constant, because as you turn you "bleed" off energy. The Zero was so maneuverable because it was so light. Anyway, as a compromise I used the best turn rate in degrees per second for each plane, then doubled the number and that was my constant. My reasoning was what better source than the best World War II flight simulation. I play the game IL-2, I have found that every plane has strenghts and weakness. Anyway the results were most Japanese planes gain maneuverabilty, some Allied planes gained and some lost. Of note, the Spit gained, La-7 gained, all bi-wing planes gained, the F4Fs gained, the F4U lost, as did the P-47, and P-38. I also used the best speed rating for the "speed" and found the maxium speeds changed very little, with some exceptions. The P-38s gained speed, and several of the Japanese late war planes gained speed also.
"Actions Speak Louder than Words"
"Give me liberty, or give me death"
"Pass the salt, please"