Take into account that obvious trades and recaptures are often strong and fast (premoved at times, even). Like a big exchange at the end of the middle game.
My stats are interesting. In general, the centipawn loss gets bigger when I think longer, but when I think for more than 30 seconds, the centipawn loss goes down. I wish there was a setting for thinking > 2 minutes.
Im playing bad in both - slow and fast games. :D But fast games are a bit harder to me, in slow i can think more and figure out something nice sometimes.