Their performance numbers are sketchy as all hell, so even if they had some way of comparing performance with and without constant noise, would they be able to

Their performance numbers are sketchy as all hell, so even if they had some way of comparing performance with and without constant noise, would they be able to glean reliable information from it? So it's close to perfect information on rent vs. some vague and unquantifiable "I can't focus" complaints regarding the noise in a work environment.