Nope, vsync is off on mine and I get no tearing. It goes in line with what was posted earlier about the game engine dynamically adjusting things like this if your system can't maintain 60fps.
AS he said, vsync has nothing to do with framerate, it merely stops the frame buffer being changed as its being sent to the screen, tearing occurs when the frame is updated part of the way through being sent to the screen so it literally ends up sending two different frames to the screen.
You could have 300fps and one of those fps can update mid sending that frame to the screen,its just a lot less likely to be noticeable, or "bad" over 60fps.
Think about it like this, the single worst case scenario for screen tearing is when someone is turning in a circle fast, just spinning around, if you're doing 2fps, then that entire circle you're only going to get two different frames, where as the "perfect" turning circle you'd want to see basically 360 different frames. At 15 fps, its smoother but not good, at 30fps, smoother again, but not great, 60fps, pretty damn smooth, and after that you're getting severely diminishing returns in difference between frames, so that even when it does "tear", you can't really see the major difference.