Using Big Data for Recruiting

This Gild algorithm does not sound very impressive.  It includes 300 variables, but some of those are the skills a person lists for him/herself on LinkedIn and the ranking of the person’s school in US News & WR, which is a crap ranking.  Also, there is no discussion of how they determined that these 300 variables are drivers…what are the outcomes they are measuring against?  An employer’s rating of an employee over time, and then do a regression to what variables a highly-rated individual touts?  The approach is nice in theory, but the article doesn’t give me confidence in the accuracy of the output.