This is where I disagree. 4 points to consider:
1. The quality of German pilots plummeted at the same time when all of the 8AF FG's (save one) were being equipped with the P-51.
2. At the same time the numerical superiority of the Allied AF's increased from manageable to impossible.
3. It is said that most of the pilots did not see the attacker who shot them down. So the performance difference obviously does not matter in these cases.
4. Relating the above, the P-51 pilots had more opportunities to such attacks (due to that very range), when German pilots were taking off, climbing, landing, not expecting to be attacked.
Sidenote:
You have a habit to put your answers inside other peoples posts. This makes direct quoting impossible. Just FYI.
1. Between Dec 1, 1943 and May 30. 1944 the quality of the German forces in LuftFlotte Reich was as high as it ever would be with the great influx of experienced pilots and leaders from both Ost and Sud fronts as entire squadrons were transferred for the Defense of the Reich. Units such as III./JG 54, II. and III./JG 27, all of JG 3, all of JG 11, JG 1, II and III./JG 53, JG 300, JG 301, I.and II./JG 5, II./JG 51 (IIRC) - plus the ZG 26 and ZG 76 plus NJG 2, 5, 7 and I. &II./NZG 101, I. II./NJG 102. This doesn't include the formidable JG 2 and JG 26 units.
The point may be that the LW relatively speaking was less experienced on the average compared to 1942 but it was equally experienced to the 8th AF average pilots - most of which had not seen combat until the ETO while the LW units flowing into LF Reich were all experienced for some time fighting in Russia and against the Brits and US in the MTO. Replacements were less skilled on the average but not the pilots within the transferring squadrons.
2. The force structure and sorties flown by Mustang units was a small percentage of escort Groups in the 9th and 8th AF. During Big Week February 20, 1944 there were two operational FG's - the 354 (1/43) and 357 (2/43). By the end of the first week of March there were five (4th, 355th, 363rd) plus three P-38 FG's (55th, 20th, 3634th) compared to (56, 78, 352, 353, 356, 358, 359, 361, 362, 363, 365, 366, 368). At May 1, eight more P-47 groups were operational plus two more P-38 groups plus 339 and 352nd FG Mustang groups were operational...by May 1, the 36, 50, 371, 404, 405, 406 P-47 groups were added and the 352nd converted to Mustangs.
Only the P-51B was in the ETO, only seven Mustang and five P-38 Groups were operational - but seventeen P-47 groups were operational - so the forces of the two combined US Air Forces (8th and 9th) were 29. Interesting but a.) Half had no more than two months of combat experience, only 12 could go near Berlin, only five could go to Poland and Czechoslovakia or far southeast Germany.
Of that group of seven Mustang groups, only two P-51 Groups could be allocated for target support of up to seven boxes of 50 bombers each over a trail of 30+ miles. Yes good planning and Control by the ground controllers could and did put enormous relative strength at the point of attack where only one, perhaps two Mustang groups, could engage the LW attackers.
3. "Some Say" that a lot of lousy shooting was involved by both sides, creating an opportunity to evade given skill and performance advantage of some form... meaning that maneuverability was still important for survival when placed in a dangerous situation - bot sides are replete with reports of 'escape'
4. True - which made the Mustang the most critical fighter in the battle for daylight supremacy in preparation for the Required air superiority over the beaches during the critical landing and consolidation phase, June 6 -June 20