depends on the gametype
on conquest that's not possible
in TDM, there are some guys with 2200spm without premium who are legit.
They just go to the side of the canal in noshahr and shoot everyone
in metro, I have a friend who went 102-0
his mouseaim isn't that special
he just blew everoyne up on the other team
also if they have prem, and their account is recent, 1800spm is completely possible.
especially if you play rush
only way to tell mouseaim is aim400kg ofc
if you do that and do really well on the human benchmark reaction test, you are automatically going to do well at every fps game.
well, provided you aren't zubin and move like a total derp.