Currently the MiG-29 was modeled off of its fastest turn time capability, however this is a 1 time turn using either the AOA limit or max G limit it is not the sustained turn time like @Fulcrum-E tried to pass it off of.
For example at 550 KPH you can make a full turn in 20 odd seconds this is not the sustained turn rate however. What this really is, is if you pull to the Max G limit at 550 KPH how long will it take to finish the turn. This does not include speed gained lost or anything.
Turn performance chart vs game:
.5 Mach ITR vs STR (.5 Mach is 611 kph)
The Sustained turn rate with 1500 KG fuel in game is 6.1G According to the Chart it should be approximately 5.2G (1G more than IRL)
Instantaneous G at .5 Mach should only be 7G in game its 8G