I would not be too hard on the OP's instructor. I think his experience is probably quite common. I have been flying a G1000 182 for about two years, and from my experience there is only one way to learn to fly one. Read one of the many good books on the system, utilize a G1000 simulator preferably with a flight simulator so you can also "fly" the system, and then fly a plane with one. My CFI(I) was G1000 certified, and her ability to use the system was basic at best, and I taught her as much about the system as she taught me. This is not criticism of her teaching abilities, or even of her knowledge base which I feel are pretty much average, but speaks more of the complexity of the G1000 system. I have found that even when speaking to the "experts" at Garmin there answers are often wrong as much as they are right.