Hi Tom, I'm relatively new to turbines but here goes.Yes the engines have gotten better in throttle response time. But with a turbine there is only so much you can do.Unlike a piston engine you can't just dump fuel into it and expect it to run up the RPMs. Fuel flow must be carefully metered both in acceleration and deceleration. If to much fuel is added on throttling up ,you get a rapid temperature increase and if fuel is decreased to quickly on throttling down engine will flame out. It's the micro proccessor that makes these mini turbines a reality today. If you take into account also that the jet engine is not putting out alot of static thrust at lower speeds and the fact that there is no prop wash over you flying surfaces you kind of get the picture. Get yourself a flight simulator , the lag in response time is built into the turbine aircraft program. Hope I helped , Doug