I am right, you are looking at average framerate. With VSync on, using a 60Hz, monitor the FPS will be limited to 60, 30, 20, 15, ect. Triple Buffering will allow the video card to store a frame and work on a new frame while it is waiting for the next refresh, which basically means you might have one out of three or more frames take 1/60th while the others take 2/60ths.http://www.hardforum.com/showthread.php?t=928593
read the last 5 paragraphs.
Don't use 60Hz unless you like looking at 30fps.