Considering that it seems this may be the case for the “well-prepared” AF community, I wouldn’t be surprised if this was higher for the full L3 candidate pool.
Considering that historically ~50% pass and assuming an MPS ~60-65%, but also taking into account the small sample size/reporting bias of this forum, I wouldn’t be surprised if the average candidate (scoring right at the MPS) was scoring at least 60% overall on mocks.
To be fair I made the mistake of saving the CFA AM papers until 8 days ago having only done schweser to that point - although it was a bit of a shock to the system at least I could understand what they were actually asking me