Some people have counted all the hits on some of the various balls so they could share that info with the community.
In fact, some of the charts that have hits per ball by ball make, model, and durability rating that are in older forum threads are somewhat out of date because the ball section in the pro shop has changed.
It's likely very few people count all their hits since the game client page has a meter that gives an approximation of how much ball life the ball in play has remaining.
I usually have no fewer than 9 of the balls I play in the bag so I don't have to closely watch the life of each ball.