I wanted to post this video for our swimmers (and other swimmers out there) to watch.  This is the arm technique that needs to happen in butterfly in order to obtain/maintain max velocity in the pull.  Notice in the video that the arms enter the water around shoulder-width and Ian Crocker goes right into an EVF (early vertical forearm) and begins the pull phase which is nearly a straight pull down the side of his body.

This arm technique in comparison to the key-hole approach is much quicker, produces more velocity, and increases turnover which decreases times!  Enjoy the video!