your in the ballpark for sure......I flre king airs and learjets.....the older lears you cant firewall them either.....but they are less complex when it comes to the start. The king air was pretty easy. MOST turbine engines, if they survive the start are gonna run just fine.
on trips under 200 miles the king air and lear will arrive about the same time.....anything over that the lear will run circles around a king air. the king air's engine's aren't that touchy though. The PT6 is very reliable and easy to operate. I flew a B100 which is a king air 200 body with shorter wings and Garrett engines on it. The TPE331's were different to operate. unlike the P&W PT6, they were direct drive(the prop was connected directly to the shaft) so they were a lot more responsive and you could run them hotter for less fuel.
I havent found too mant planes that fly right.....I know that the limits of fs9 have a lot to do with it. every plane in my library has been heavily edited to make them fly right.