Francis,
Roll rates vary considerably with speed. If you take just the F4U-1 Corsair (See:
http://www.wwiiaircraftperformance.org/f4u/f4u-1-02155.pdf), the rates of roll during tests (overload fighter, 273 gallons of fuel in fuselage tank, wing tanks empty, full aileron deflection) l, were as follows:
1) right roll: 70° / sec, clean, 150 mph; 84° / sec, clean, 200 mph.
2) Left roll: 70° / sec, clean, 150 mph; 76° / sec, clean, 200 mph.
So your prediction of 120° / sec for the F4U is nearly twice what the aircraft was capable of ... at 150 and 200 mph, with no fuel in the outer tanks. Fuel in the outer tanks will make it roll slower. As a rule, very few WWII fighter could exceed 90° / second. Each must be researched individually, and the rate changes consideraly with speed.
If you want to do a fun simulation, have at it. If you want a realistic simulation, you need to carefully read performance reports from WWII. The thing is, they tested what they tested, not necessarily what we want to know today. They figured, for instance in the report above, that testing the rate of roll at 150 and 200 mph was enough to characterize the aircraft. But what about 400 mph and above? Not shown in the report, and you cannot assume it gets higher because most WWII aircaft rolled slower after reaching some max roll speed that varied by a lot between aircraft types. To be complete, the report also characterized the roll rate in landing configuration at 90, 150, and 200 mph, but that is not a configuration you would use in combat.
The Me 109, for instance, was a pretty good roller at 250 mph. But at 420 mph it was pretty solid in both pitch and roll, and the stick could not even be moved more than about 1/4 deflection to either side due to aerodynamic forces and a very narrow cockpit, making application of much force to the stick a problem. The 109 was designed for combat at 180 - 280 mph and it was a bit out of its element at 350+ mph.
From:
http://www.spitfireperformance.com/spit1vrs109e.html :
The Me 109E could roll 45° in 1 second at 200mph, but the same roll at 385 mph took 4 seconds.
The Spitfire Mk I could roll 45° in 1.9 seconds at 200 mph, but at 385 mph it took 3.8 seconds.
It looks like the roll rates of the Me 109E (or Bf 109E) and the Spitfire Mk I were equal at about 330 mph, with the 109 rolling better when slower and the Spitfire rolling better when faster. Neither is anywhere near your projected roll rates above.
Don't go with opinons, go with documented tests. If you can't find them, then making assumptions will render the simulation not vey realisitc, though it still could be fun.