In Micky D's Special Sauce? Yes, but not enough to make much difference. I've always equated Special Sauce with 1000 Island, and I've been known to use Thousand Island on burgers.
Though more usually, I make coleslaw and put some of it on the bottom bun. Then add the burger, cheese, bacon, whatever, and top with ketchup. The flavors blend together. And of course I have more coleslaw and a pickle on the side.