Bingo. I suck at pinball, I put something like 2000 plays on my iron maiden within the first few months of having it and the average ball time was like 12 seconds lol. I got into a habit of restarting if my first ball was bad and even if I didn't do that I never once made it to the end game or pulled a 45 minute game like those pros can do. My best games last maybe 10 minutes at most and those are few and far between.
Maybe play count + average ball time gives you a indication of how long the game has actually been played but it still doesn't mean that much. One person could have played it a lot but cleaned and waxed after every play, another may have played it a lot less but did zero maintenance meaning way more potential damage to the PF.