I guess I am that average Joe bowler because I simply love my Liberator on fresh THS for league play.
I bowl on a fun Vegas league with many different styles of bowlers. Most of which roll straight up the middle with plastic.
I started using urethane because I got a lot of over/under with my Darkstar. The Liberator allowed me to move outside of 5 and play straight up with very little angle to the pocket. I actually shot my first 700 series with it.
Being that the Liberator wasn't drilled for me but fit, I decided to get a Natural Pearl and on league night shot around 670 with it.
For a bowler with low revs and high speed, I don't see urethane working for him/her. You need to be able to put a little hand in the ball or it will be no better than a house ball.
I use whatever ball works for me.
Edited by Easy10pins on 1/12/2011 at 9:19 AM