Actually, there have been some pretty serious threads about the P51, P38 and F4U handling and turn performance, specifically with use of flaps. I bet there's over 50 pages on those planes alone, on that topic alone.
Saw a couple of long discussions with some information in them...but just searching p-51 there were only 9 full pages.
Discussions on the 109 and 190 totalled about 40 pages...since the year 2000.
The issues with LW flight models is nearly as old as these MMO flight sims...with promises of highly realistic fligh models the LW aircraft have consistently fallen short. I blame it on the lack of solid data. Why some retail games and game add-ons have better LW flight modelling is a mystery to me.
Now if we could get Pyro or HiTech to fly do some real life flight testing in a 109 and 190, maybe even simulated dogfights...I wonder what would get changed?
Yeager...WBs JG-27...Thor can answer the rest.