Yeah that's a big surprise to me, although he has been racking up a lot of XBH. In the first 150 PA of the season (through May 31) he had 13, and in the next 200 he had 26.
FWIW I don't recall if it was Tango or James, but one of them said they throw AEV out completely and focus on 90th% instead. Said there's just too much noise in AEV.