I have long held that the Hurricane (and Bf110) are more agile in AH than they were historically. My posting history on the subject backs that up (search for the phrase "Hurricane Mk XIV" or "Bf110K-4"), but that said in an actual organized event I suspect that the P-39 and Yak-7 would prove to be the better fighters due to speed and climb.
It's good that we came to the same conclusion about Hurricane's performance completely independently.
There is a very detailed report based on the speed/stall/dive tests of HurricaneIIC made in 1943 in NII VVS (Russia).
http://www.airpages.ru/book/hurricane_00.shtmlTo sum it up:
The max speed reached in dive at full throttle (at 70-80 degree angle) was 640 km/h ias. It was in good accordance with manufacturer data (390mph)
(In AH the plane quickly reaches 500+ mph ias starting to disintegrate.)
Stall/spin tests showed that the plane falls into left spin quickly and without warning and it takes additional time/alt to recover from spin due to delay in response on controls while spinning.
(In AH Hurricane always gives a long stall warning and it is possible to recover control of the plane immediately if stall happened.)
It is obvious that Hurricane is modeled way too wrong in AH.