Why is the acceptance rate of this user not displayed?

He has 9 questions, all with answers, two of them accepted, should be a rate of about 22%.

I checked the 3 newest questions, on none of them the rate was shown. For other users I am able to see the rate.

So what is special with this user?


, the accept rate shows up:

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Accept rate is calculated on questions that are older than 3 days and is heavily cached, according to this faq.

  • OK, I was irritated, I saw he is a member for about 17 month, but I didn't realize that 7 out of his 9 questions has been asked in the last two days (!). – stema Dec 19 '11 at 7:38

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