I've bowled in a Sport league the past two years, mainly to sharpen my spair shooting. However, "sport bowling" has been around for years, it's just that they defined a set of specs to make it uniform (Team USA, Team Challenge, etc). The problem I see with it is that the surface, players and pattern can cause such a disparity in the shot. There are some easy Sport shots and some ridiculous ones. Three weeks ago, I had the front 9. The track had opened up little and I had two lefties on my pair so there was carrydown in the middle to create a little hold. I threw the ball well but I had a few boards to play with and only moved my feet 1 board. This past week I crossed with 3 righties playing the same area as me and I was literally moving every 3rd frame. Had to stand in front of the ball return and play 5th arrow by the end of the night. Moved a total of 15 boards! This was all on the same pattern.
The other problem is that the shot can change so quickly that I don't see how any one could actually learn on it. If I were a beginning or even an intermediate bowler, I would have a heck of a time figuring out if it's the lanes or me. I hit the 2nd arrow in frame 1 and strike. Two frames later hit 10 and come light. Was it me or did the lane change? Most beginning and intermediate bowlers don't know about their game to determine which one. I see it all the time in the league. It's not just a matter of execution, but also lane reading and adjustments. That's a lot to throw on a new bowler.