We have now realise the error of our ways and are introducing compulsory RF Theory subjects to all our Networking courses.
Of course as others have said this is more marketing 'case study' by the antenna vendor than story. Notice TFA mentions that they did test antennas from other vendors, but give no indication of the relative performance. My bet is that most would be within the margin of error and that the ultimate choice came down to the discount they received for pushing out the 'case study' as news.
"Help Mr. Wizard!" -- Tennessee Tuxedo