Stoney, in case you did not read the whole thread, I wrote earlier: "Lednicher article does not help much with this because it leaves out the effects of cooling entrance and propeller effects."
So I do have it.

While a very interesting article it still lacks detail and some wrong pictures do not really help.
"Given the higher wingloading, it should have to turn at a higher Coefficient of Lift than a plane of similar weight with more wing area, thus, more profile drag as a result."
This is the feature I'm very interested of. Does it really happen that way in high speed or does it happen so that a plane with a bigger wing, while pulling less AoA to achieve same Gs, actually still creates more drag area and thus slowing it down more quickly than a plane with a smaller wing with more AoA would?
"In aviation, induced drag tends to be greater at lower speeds because a high angle of attack is required to maintain lift, creating more drag. However, as speed increases the induced drag becomes much less, but parasitic drag increases because the fluid is flowing faster around protruding objects increasing friction or drag."
IE. the more wing area the more parasitic drag (among other forms of drag), and in high speed any AoA will add to that.
It may well be that FW with its weight/power/wingloading ran out of the usable speed range in which it still could maneuver efficiently but I'm not very convinced that it did happen. We could claim that the first versions of FW were designed with just enough wing-area to make it competitive (or slightly inferior) to contemporary fighters in 1939 and that in five years it ran out of its potential due to increased weight, BUT why did they keep such a small wing with Ta152C? (NOTE: FW190 196.5 sqf vs Ta152C 210.9 sqf and 250.7 sqf H-models.)
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BnZ, your G summary is interesting but I do not see how it would give answer to my "G-story" in which I pointed out that there is something odd with either 190 or LA7, considering that my observation was correct. On the other hand it may well be caused by simply lag in my end, but that was not the only time it has happened.
"I think the famous turning circle drawing derived from British tests can be found somewhere at Spitfireperformance .com. It places the 109, Jug, and 190 in roughly the same range, with the Pony turning tighter than all 3. You can also find there a report comparing the F6F and F4U to the FW190 and concluding the former turn much tighter."
I have seen them both. The picture and report is so general that it probably has more propaganda value than scientific value. The US test of F4U, F6F and FW190 does not tell you exactly how the turning comparison was made so I assume that it favored the US planes too much ie. slow speed stall turns.
"I can't help but wonder just what the heck is going on here..."
Well, I agree. Most people have made up their minds and decided what is fact and what is not. I haven't. This is a very interesting and complicated subject IMO.
-C+