Do Mystics count as spellcasters for the purpose of attuning to magic items?

A lot of what you guys are doing know I think is from breaking the Mystic into smaller parts and making it for every class

Design goals for Psionic subclasses – The Mike Mearls Happy Fun Hour

Back into Psionics! – The Mike Mearls Happy Fun Hour

Is there is any consensus, or even leaning one way, as to whether 5e psionics will be magic transparent or not?

The Psionic Class pt3 – The Mike Mearls Happy Fun Hour!