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by megascone 2395 days ago
I suspect that a large part of this is that Amazon has (according to Wikipedia) more than 300 warehouses.

If this is correct, then it would not be surprising if a few warehouses are outliers even if the overall figures are reasonable. After all, randomness (both in terms of overall luck, and the distribution of shitty managers) will end up skewing a few of the results very high or very low.