Where the six seconds comes from
The figure comes from published recruiter eye-tracking research by The Ladders. It is not something Revquix has measured, and we do not do eye tracking - we use it the way the industry does, as a rule of thumb for how long a first pass takes.
What this tool actually does is deterministic and checkable, which matters more than the number. It takes the part of page one a reader reaches first in reading order, and reports which of four specific signals are not in it: how long you have been doing this, your core stack, your strongest measurable result, and your seniority.

