Personally, even if I could, I wouldn't want to work on any countertop directly anyway. It seems to me that it's far more sanitary to use cutting boards, and easier to clean up as well. Besides, knives prefer wood for cutting. Much faster. I use plastic boards for meat and fish, though...

And I'll reiterate my previous statement that granite countertops are not hard to care for and maintain. Like I said, 15 years with zero wear on the stone.