Having bowled the PTQ for this event from the right side, I can tell you this: early in the block, the best shot was from the outside, on the right that went away after a couple of games. Late in the block the lanes opened up so that anywhere between 2nd and 4th arrow was very playable, but never got so far inside as to interfere with the lefthanders. I was not near Page or Cimonelli, but it is my assumption that the outside shot never went away on the left.
It is amazing when you look up on the board and the leader is averaging 271 after 3 games and the average goes UP after 4!