Every ball is "condition specific". The real problem is the bowler. Urethane, dull(or matte or sheen) reactives, mild cores, particle balls, and combinations thereof tend to "blend out" or mask variations in the bowlers technique. Top level professionals and amateurs have much less variation in hand positon, rotation, tilt, speed, etc. from shot to shot, and as a result have more success with balls such as the Intense.