
When Valve first introduced ranked play to Deadlock the player distribution was a little funky. Seeing that Deadlock was and is still in closed beta, this was to be expected, but still, instead of the normal bell curve, players were spread out across all the ranks. It was a little chaotic to begin with, but over time, things have seemed to settle down, at least for most of us.
If you look on TrackLock, there's now a more distinct bell curve that follows the more usual distribution of skill levels seen in competitive games. Although instead of being kind of bottom-heavy, with the majority of players slotted into the lower ranks and then tapering off into the higher-skill tiers, Deadlock seems to be middle-heavy.