Gentlemen,
I spent last Saturday through this wednesday watching my son play in the NH American Legion State tournament. I saw every imaginable hitting style you can think of. Some I cringed at, but you know what, for that player....it works.
I also saw a couple of NECBL games this summer, and you see the same thing there. These are some of the best collegiate players, and there preswing habits are all over the lot.
To me there is a difference though from a player with years of expereince who has found a comfort level and a young player just trying to develop a consistent swing. I am a firm believer in the KISS methodology. That is why I feel when working with a young player, it is best to teach him to hold the bat in the preload position, and allow him to use a small "waggle". LOL...Simply emulating your favorite MLB player is not the way to go. I watched a 9 yr old kid in little league tryouts this year trying to emulate Jason Varitek. Jayson is a very good MLB hitter, but i would not recommend a 9 yr old start with his bat position.