I think the disrupting the compounding is a huge dagger. I do not know of many people who have kept 1-2 holdings static for 10+ years and allow Amazon, Google, BRK to compound for years on years.
I have 1 share of BRK.B to get his annual letters sent to me. But, I remember back when BRK.B were introduced he specifically said he didn't believe they were a good value. Warren talked it down. Also, through the years, he talked about how his universe has shrunk and he would marginally outperform the S&P, if he was lucky.
He's results have been good, but not great. I would love to have the early Buffett partnership returns.. but, the last 10-20 years have been good, but not great.. but, again, if you invested him in the 70s or 80s... it's been 30-40 years of compounding by him.. that's not something most people do nowadays.
I would love to see a poll of everyone's longest held position... But, the average is probably 1-2 years, if I tender a guess.