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by hendersoon 2939 days ago
This is interesting analysis, but it's based on NYC MTA countdown clock data which is just rampantly inaccurate on lines other than the L. It is regularly, customarily, up to 4 minutes off in either direction, in my experience.

Since trains are supposed to be spaced out 4-5 min or so, that means the clock is only really useful to tell if there's a huge delay.