I hate to...but I must...the P51 is definitely not a zero....but by far is it one of the worst "turners" hell the flaps come out at 300.....
Every single engined fighter except the 190 family can make a smaller turn radius than the P-51 can. And you have to be careful with those flaps. More than one notch creates a great deal of drag and reduces your turn rate a lot for not much gain in radius. Widewing did some testing on this you can probably search for on the BBS.
it is great at high speed maneuvers,one of the best..... it is good at slow speed maneuvers....
Again, everything is great at "high speed maneuvers". 5g@300mph IAS is the same whether you'e doing it in a Pony, Corsair, Hurri, P-39, 190, P-47-Whatever.
The laws of physics dictate that the same speed and the same G-load=The exact same rate and radius of turn. The P-51 has no special advantage in blackout-riding turns. As for slow speed...the P-51 stalls at 100mph IAS clean. This is just about the highest of prop fighters in the game, except for various 190s (Hint: The stall speed is the minimum airspeed needed for the airframe to generate one G of lift. Study some aerodynamics to grasp the implications) Even with full flaps out I believe the stall speed will still be above 90, and they create massive drag in game. By way of comparison, the Corsair stalls at about 70mph with full flaps.