A 60 Hz display has about 16.67 ms between refreshes, so 200 ms spans roughly twelve 60 Hz frame intervals. At 144 Hz it spans roughly twenty-nine refresh intervals.
Those frame counts are only a way to visualize the duration. A reaction is not processed in neat display-frame chunks.
In a carefully calibrated study of 1,469 adults aged 18–65, the mean simple visual reaction time was about 231 ms before correction for measured hardware delay and about 213 ms after correction.
That gives useful context, but it does not establish 200 ms as a universal threshold because different studies use different stimuli, devices and procedures.
If your single fastest reaction is 200 ms but your other trials are 250–300 ms, your typical response is not 200 ms. If your median across 10 clean trials is 200 ms, that is a much stronger description of your session.
Always check which statistic a website is showing before comparing numbers.
Yes, valid simple responses below 200 ms can occur. But as numbers become extremely short, anticipation and hardware timing become increasingly important to rule out.
A suspiciously tiny result should be repeated across many randomized trials before you treat it as representative.
It does not tell you how accurate your aim is, how well you choose between targets, whether you can inhibit a wrong action or how quickly you respond in a networked game.
For a broader performance picture, combine Classic with Choice, Fakeout and Aim.
For a simple visual browser task, it is a quick result for many adults. The most meaningful comparison is still your repeated score on the same setup.
Very short latencies can occur in specialized tasks, but a 100 ms browser click should be interpreted cautiously because anticipation and hardware timing become critical.
About 12 frame intervals, since each 60 Hz interval is about 16.67 ms.