That would eventually make a nice bug report, as Mirage 2000C max speed is reportedly around 2500km/h. Nonetheless, that will still be temporarily logged in our DCS-World record page until Razbam check more seriously their flight model. It must have looked fast from up there !!!
Beside, we are considering a custom record event where all airframes would be available to break new altitude, speed, or simply stupid things such as the wildest landing or the craziest formation flight. Please let us know if such event would interrest you !