Please, I have seen Psylocke rip through Jean's mind and mindwipe her right afterwards. It was that time when Betsy told Jean that she was sleeping with Cyclops. Ghost Jean and Jeen are struggling with an unconscious Emma.
That's right, and that's because Jean is genetically fit to host the PF. There is nothing special about Jean without that. This is what Emma was getting at when she said that Jean was always an underwhelming basic telepath. She's saying that Jean is nothing compared to her without the PF.
Witness the FULL POWER and SKILL of an ANGRY JEAN GREY UNLEASHED! Heeyah!
http://2.bp.blogspot.com/k2Ab9shTB1I...g_sdg4vQ=s1600
http://2.bp.blogspot.com/reS1-dr3zot...ZUyGG3ew=s1600