The problem with the game is that this isn't really what I see Sable. Equal pilots the P51 (especially the P51) will outturn a 109 hands down. This may of course be due to flaps, and due to the fact that the 109 flaps are still not fixed. However, another problem with the 109 in a turnfight (190 aswell) is that it can almost never get slow enough to actually use its flaps, getting bellow 170mph in a 109 or a 190 is a pain in the but. Getting it up into a spiralclimb will do it, but compare it to a Pony in such a climb and the 109 is MUCH MORE unstable not to mention how easy it snapstalls.
Oh well not sure why I discuss it really, I know I've said that before, probarly will say it again.