I ran a big (for the region) general (as in not niche) dating site and I would say it is more nuanced than that. By far most people complaining that they did not get any interest had minimal profiles. When they wrote more, they got more. When they wrote too much, it went down again. So minimum as in; the minimum to entice, and I would say most people do not know what that is, so they write too little or too much as a result. Probably the same for resumes.