> The sources relied on in the article today were never in a position to understand Theranos’ technology and know nothing about the processes currently employed

> The sources relied on in the article today were never in a position to understand Theranos’ technology and know nothing about the processes currently employed by the company. Note the use of the word "current". Implicitly, they're admitting that the process has changed since the time of the former employees, and they're not disputing the process described by those former employees. Which means, that at some point they indulged in rigging proficiency testing.