S!
Zapatista. It is still the man behind the stick pushing the plane to it's limits. Not everyone is capable for any reason(insert here) to fly a plane to the documented numbers no matter how. That is a fact. If you really want a game with plane speeds set in stone then try Aces High. Not a single plane goes a notch faster than documented values, nor climbs or turns better. All is hardcoded. Because AH and CoD are GAMES and there will always be complaint/debate/whinery on them as they are just a representation of something, not the real deal. Not a single game models systems EXACTLY as they work in real life as there are too many variables included. We get an average or estimate only that can be handled by our hardware.
You say 100oct gives 15% more speed. Looking at curves yes it does at 12lbs power setting, but this is not the 100% time setting you use. How much does the speed increase at NORMAL parameters, the real 100% power setting from 87oct for example? Spitfire at 6,25lbs on 100 or 87oct vs Bf109E at WEP or 1.31ata? Should be clear to distinguish emergency/overboost from normal parameters that can be used at all times, not only for a limited time. By all means please make the game historically accurate within it's inevitable constraits of being a game, but do not expect down to last digit accuracy.
If we can get something within let's say 5-15km/h I am more than happy as you can lose the same speed with inproper trim or power/mixture/whatever setting. What is more important that the FM itself is good enough to being able to handle more complex things in a reasonably resource friendly way. I remember Oleg saying at beginning of CoD announcements: You want more fidelity on things. Sure you will get that but do not expect it to be easy on the hardware. Remember that? So I think devs are having a hard time tweaking this game to be both playable and accurate enough. I think you can agree on that. This is not the copy/paste FM original IL-2 had
So let's just hope the patch addresses right things and the rest we can test and report for further tweaking. Until then we should at least try refrain from mud sling contests

I apologize for jumping the gun.