A statistically improbable heater is about as likely as a statistically improbable cooler. All this being said... 20K or so sample really isn't much either way. I wouldn't put too much stock in the All-in EV stat, 'cause as I understand it, it only measures the EV when the final money went in... not the EV vs a range of all the decisions that preceded it. Plus it's based on you knowing exactly what villain had... which you don't... so I'm not even really sure that it's worth much of anything outside of entertainment value....

But you're doing the right things... reviewing big hands, etc. So be brutally honest w/ your game and, if you're feeling off kilter, dropping down to get some confidence back isn't the worse thing you could do by any stretch...