Why the Estimated Reading Time Didn't Match How Long It Actually Took
A mismatch usually comes from the text's actual complexity or technical density differing from the general assumption the estimate is based on (complex or unfamiliar material is read more slowly than the standard assumption), an individual reader's own reading speed differing from the population average used, or reading behavior that isn't pure linear reading (skimming, pausing to think, or re-reading sections).
This gap between estimate and actual experience is expected, given that a reading time estimate is necessarily a population-average approximation, not a personalized measurement.
Text complexity differing from the assumption
The standard 200-250 WPM assumption is based on moderately complex, general text — dense technical writing, unfamiliar vocabulary, or content requiring careful thought (like a complex tutorial or technical documentation) is generally read more slowly than this general assumption, producing an estimate shorter than the actual experience.
Individual reading speed variation
Actual reading speed varies significantly between individuals based on reading experience, familiarity with the subject matter, and language proficiency (for a non-native-language reader, for example) — a reading time estimate based on a population average will predictably feel too fast or too slow for anyone whose personal reading speed differs meaningfully from that average.
Non-linear reading behavior
Skimming quickly through familiar sections, pausing to reflect on a complex point, or re-reading a confusing passage are all normal parts of real reading that a simple linear time estimate doesn't capture — actual reading time for a specific piece of text can vary session to session for the identical reader, depending on how they're actually engaging with it that time.