I haven't played the game or demo yet, but this mouse "lag" issue seems to be pretty big. However, there seems to be numerous things for what this "lag" represents.
If by this mouse "lag" people mean a sort of heavy feeling to mouse aim, I can understand it, giving that this game is supposed to be more of a simulator than an arcade game, and would still be looking very much forward to playing it in the future.
But if by this mouse "lag" people are referring to input lag, this would be a bug and must be fixed. If BIS were to acknowledge it and state no fix is on the way, that would be a shame.
Now, to be clear, which mouse "lag" is this thread referring to?
A: Heavy mouse aim
B: