This post has nothing to do with Lancair, but several have mentioned the Airbus, so I thought I'd share my thoughts about it from an ATC standpoint.
The airbus A320 is one of the worst airplanes out there as far as ATC goes.  I know the pilots that fly them think they are great, and don't understand this thinking.  This airplane has been involved in a majority of the system errors that we have in the ATC system.  The fact is that this airplane just flies different than the rest of the fleet.  The autopilot system is designed for passenger comfort, and the rate of turn, the speed in which the aircraft starts turning, and stops turning, and above FL360 it's a dog in the climb.  Many times I've had an A320 ask for FL390, and the computer is telling the pilot they can make it in say 3 minutes, but changes it's mind 6 minutes later and the airplane just can't make it to that altitude yet.  When we say turn 30 degrees left for traffic, that's what we want to happen.  When the A320 drivers don't just turn the airplane manually, and just dial in the heading and let the autopilot do the turning, he Airbus might have to think about it for a while (I've seen it as much as a minute before a turn is started), then slowly start a very shallow turn, all the while the other aircraft is getting closer and closer at a rate of maybe 1000Kts.  As air traffic controllers, we have all been burned with the A320, and have learned over time to treat them differently than any other airplane.  Oh, the radios are some of the worst too.   You might ask what the best airplane is for us to work with in the enroute ATC system.  Well, now that would be the Citation X (C750).

Ron Galbraith
LNCE - N5ES