I'll wait til Ted answers myself,
but... The right arm doesn't straighten til after impact.
Watch:
http://www.lynnblakegolf.com/Video/HittingSwinging.wmv (I’m sure you have many times)
Lynn shows that the right arm is still bent even past impact through the low point plane. A straight arm at impact is a power leak.
The Right shoulder is always on plane- Down, Out and Through- on plane. The left only response to the right shoulder’s action.