My older dd, who I don't believe is 2e, had an 11 pt scatter w/in PRI and a 7 point scatter w/in VCI. In her case, I'd attribute a lot of it to meticulous tendencies and significant anxiety having come off a really bad school year in which the teacher spent a lot of time yelling at her.

My youngest, who is 2e, had a 4 pt spread w/in PRI and 7 and 3 point spread in VCI (two different testings).

Study Strategies for Accelerated Learners