Sorely missed from Warbirds, AHII did not simulate increased airspeed sounds as you increased speed of aircraft. especially noticed during diving
However, AHIII brought that back and is a welcomed (hear) not (sight). Yes you should hear more airspeed and prop spinning in a dive (even if you pull back prop). IT was a grip of many i knew in Warbirds that tried coming to AH.. But finally AH3 got it right.
Now only if they can match or exceed graphic smoothness of AH3 that is what we've come to expect from AH2 and many other simulated games ;/