Earlier quoted context omitted.
...a filter which has been mathematically demonstrated to fail at doing better than random chance at picking good candidates Where could I read more about this?
Read Joel's epic post here describing the phenomenon: http://www.joelonsoftware.com/items/2005/01/27.html The 'dead sea effect' is caused by this phenomenon: http://brucefwebster.com/2008/04/11/the-wetware-crisis-the-d... Hiring managers get the technical competency part right but they completely miss the most important things: work-ethic, tenacity, responsibility, team skills, organizational and planning ability, cu…
I think your last sentence doesn't make sense either. Since when did technical competence not count for anything? Both competence and teamwork are necessary, but neither alone is sufficient.
Point is, randomly picking candidates is a crap idea.