Welcome to the forum Allen,
http://news.bbc.co.uk/sport1/hi/golf...es/3899265.stm
click on this link and Tiger is the second photo.....
This is a link to Tigers left wrist.....although I think he's over doing it a little bit in this shot. If he keeps this position at impact which he does then he drawing the ball.
To answer your question.....If you are cupping your wrist then you probably have a inconsistant ball flight some draw some fade. My guess is you are across the line at the top and on a good day you swing smoothly back to the ball from the inside and draw it....if you rush the swing from across the line the shoulder go first then you will definatly fade the ball.
click on this link and watch the lessons on takeaway
http://redgoat.smugmug.com
Hope this helps
Ian.