Does high shear rate give better machining results?

[BrianE22]

So I've often wondered the above. I finally googled "does shear rate affect machining". There's lots of scholarly papers written on the subject - I'm sure most of them are tough reading for me. So I hoped one of you would be able to offer a "dumbed down" explanation. It's generally well known that higher faster spindle speeds (same feed rate, Inches Per Revolution, ipr) produces much better surface finishes and fewer burrs. Carbide tooling and really high spindle speeds gives great results. I'm guessing that has something to do with the material (carbide) though. Is it higher shear rate that helps so much?