I do not think he was saying the shots, and overall bowling is tougher. More the angles and carry can be very difficult. Back in the day, there was more one angle of entry to the pocket, where today, due to the technology, there is multiple angles and this is where knowledge comes in to play. I can see somoen knocking a 700 series due to the shot and technology, but an 899? C'mon, that requires a lot of talent to repeat the shots. Whether it is speed, revolutions, angle or spot down the lane, he had to repeat shots 36 straight times.