I don't understand the anti EFIS posture.
Why a student who has never seen a classic panel would be distracted by an EFIS more than he would be by the 6 dials?
I agree that it would be suitable to teach how to fly with no instrument at all, but as we need an AI for some exercises, the damage will be done anyway.
On the contrary, if you start with an EFIS, the student will be proficient with it, and not be distracted with it when he gets his PPL. And changing to a 6 dial won't be as difficult as the other way round.