I posted this information before.
Source: America's Hundred Thousand by Francis H. Dean.
"The p-38 was a large heavy fighter not suited for quick "snap" or "slam-bang" maneuvers, and had a particularly slow initial response in roll due to a high lateral inertia characteristic. The problem was a slow start into a roll and thus an inability to switch quickly from one altitude to another, as in reversing from turn in one direction to one in the other. As one pilot said "It was disconcerting to have a fighter barreling in on you, crank the wheel over hard, and just have p-38 sit there. Then, after it slowly rolled the first five or ten degrees of bank it would turn quickly, but the hesitation was sweat-producing".... Power booster ailerons, introduced the same time and dive recovery flaps, gave p-38 pilot a lot more "muscle" to improve roll characteristics at high speed, but did nothing to improve them at low and moderate speeds where maximum roll performance was dependent only of full aileron deflection instead of pilot effort."
BTW p38 is supposed to be a great zoomer.
Also do not forget that all planes will be "cleaned" before AH2 is out of beta, so planes may behave slightly different in a final release.
I am watching AH2 progress and can say I like it and the work HTC has done is really a WTG.