In the near future i want to experiment with different thumb pitches and i was wondering the actual difference between forward and reverse pitch. Also, does anybody have any knowledge of what pitches pros use?
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I feel bad for the bowler''s defenceless equipement when the bowler is not bowling up to par. . . .don''t you?

I use to go 3/8 reverse for a very long time.  For me, it actually did more harm than good cause I would kung fu grip the ball.  

Recently I accidentally had a ball drilled with 1/8 reverse pitch.  Not only does the ball come off of my hand cleaner, but I don't have the urge to kung fu grip it, actually increase my speed and rev rate.  I've gone 1/8 forward in all my equipment now.
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www.youtube.com/track8401

http://smg.photobucket.com/albums/v690/Phoenix_RsX/Arsenal/

i had 1/8 reverse pitch up until last week. then tried a ball with 1/8 forward and hung up in it. then a buddy of mine noticed i need to go under a little cause of the way i held the ball when it was at my side just holding it. so i went 1/16 forward and 3/16 right. and i shoot 300 826 the same night. it's amazing what the right pitch will do and don't be afraid to do multiple trials if needed. and once you get the right one you will no after a couple shots. but if you feel you need the change it's worth it to spend the 40 to 50 bucks cause your gonna make that back in a hurry when it comes off your hand clean

I'm a high rev high speed power player. That being said, my thumb pitches are 1/4 forward and 1/8 right. I used this on a friends ball and from then on this has been my thumb pitch. I use it to naturally get my thumb to hold onto the ball longer with very minimal grip pressure.
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HAMMERDOWN RACING TEAM