Last page of the pdf describing the new exam results format shows an example of performance by item type. Notably, the 90th percentile of essay is below 70%.
Any idea if that is accurate (based on history and/or expectation)? It would seem silly for them to illustrate it that way if it wasn’t, but it’s also a curious way to show the “mastery” level if fewer than 10% of candidates hit it.
Maybe they’re saying over 90% of candidates are incompetent? Or maybe it’s just another sign of CFA incompetence. I can’t talk about the exam, but I can say that, right? 
[said at least somewhat tongue in cheek and all in good fun, but am still curious if the 90% of candidates get less than 70% right on the essay is accurate]
There appears to be a public link to the doc on this page: https://www.cfainstitute.org/programs/cfa/exam/results-info