Sincerely Confused About Rapid Ratings


Online rapid and slow OTB are different games that require different skill sets. Being good at one does not necessarily mean you will be equally good at the other.
It is not unusual for a person's online rapid rating to fluctuate by +/- 150 or 200 points. Sometimes you will play people at the top or bottom of their range, neither of which is indicative of their actual ability.
You, yourself, will have streaks when you play exceptionally well and exceptionally poorly (be on tilt). In these cases it can seem like your opponents are playing below or above their rating.
Chess ratings are not a universal measure (like height), but are based on the pool of rated players. 1600 in pool A may be equivalent to 1750 in pool B for example.
Taken together, these will account for much of the "weirdness" seen in performance.