Lu,
Have you read my long description of gyroscopic precession? If you follow through it, you should find that the blade flying to position theory and gyroscopic precession are the same, under certain conditions.
Most rotor systems don't meet those conditions precisely, so I don't think gyroscopic precession is an accurate general description of helicopter dynamics, but it is true in some cases and close in others.
I do, however, believe it is a good subject to introduce so students can understand thru visuals how rotational dynamics isn't intuitive.
Matthew.