its a fact that standard profiles would be cnc'd, why wouldnt they be? it take all the donkey work out of the standard stuff and increases sales/ volume.
some will be made from scratch but i would imagine that these will be custom bats or sponsor bats etc as they take more time and effort to make.
why would a bat maker spend say 4 hours on a grade 3 bat when he can just sand, bind and grip? makes sense to save the time and effort for the top of the range bats which cost twice as much.
just my 2 pence worth...