I still think you are opening up your hips too early, and you don't really have any hip snap, which is why your second pull looks so slow.
For an example of what I'm talking about:
http://www.youtube.com/watch?v=L6Lq4...eature=related
Notice that throughout the entire first pull, he only extends the knees: back angle stays constant, knees go back. His legs are almost straight before he snaps his hips (which results in the "double knee bend").