The shops I go to cut. That is my preference too. Back in the '80's I worked at a shop up north. We cut the bolts (with scissors), but tore the flat folds (100% cotton only). We also opened up panels and cut single layer on the line.
If I have a very long piece of fabric and want just a yd or so, I will sometimes tear a piece off out of laziness. It's quicker than hauling out my stuff (no dedicated sewing room).