As someone with a background in both statistics and designing ELO style rating systems algorithms . it has probably changed a lot . It probably hasn ' t changed very much at all . last year or so the highest mmr was like 78 k . now it ' s like 9 . 3 k . The tallest people on the planet don ' t raise humanity ' s average height very much . average is prolly like 3 . 8 k now instead of just 3 k flat 3 k was never average . Three years ago , a 3 k rating would have put you somewhere near the top 15 % of all DotA players . There is a zero percent chance that a 3 . 8 k rating is average and it ' s highly unlikely that a 3 k rating is now the 50 th percentile . Percentile December ' 13 November ' 1650 th 2250 2650 2850 ? 75 th 2731 3100 3300 ? 90 th 3200 3700 3900 ? That ' s my best guess for where we ' re at .