It’s not necessarily undermined. Presuming the timeline is accurate: large orgs are hiring constantly and, if the person who commented is high enough in the org chart on whatever they consider to be their team, they may see a large number of hires.
Less than a month is not long enough to make the determination that your hiring process is producing better hires in my opinion (unless your old bad hires were flaming out in under a month, I guess).
