FWIW,
Compared to most symmetric balls, asymmetric cores with large Mass bias differentials (I'd guess around .016-.018 and above), ESPECIALLY Mo's and now some of Del's, (and probably Storm's) seem, to my eye, to act almost like on/off switches.
Symmetric cores, especially those with high differentails, can show differences in reaction as you move the pin further and closer to the bowler's axis. But their CG location movements seem to be reflect very gradual changes int he ball's reaction.
The movement of asymmetric-cored balls' Mass bias location seem to reflect extremely large changes in a ball's reaction. This used to confuse me; now it just astounds me - the degree of change. After all, it's just the angle of the core's body with respect to the bowler's track that is changing.
All in all, I'd say that not all balls have the new percentages that Excaliber has posted, but the ones with significant mass bias differentials definitely need to be re-examined. I wouldn't dare guess, at this point in time.
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"We get old too fast, and too late, smart."