I have found that players in general have exaggerated expectations when it comes to diving away.
I recall reading the performance comparison between the P-47 and a captured A6M wherein the P-47 was found to be able to dive away from the A6M as an escape. Players imagine that to mean the P-47 would be thousands of yards away, but in the test it gained something in the range of 200 to 400 yards of separation on the A6M by the pullout. The P-47, or other fast fighter, could escape that way, but it was not, as you say, acting like a F-15 on afterburners. We are, in the end, talking about two roughly contemporary prop driven fighters.