Couple of clues The author mentioned the tool sends out requests, and just measures response time regardless of response status. (If they fail, they fail!) An

Couple of clues The author mentioned the tool sends out requests, and just measures response time regardless of response status. (If they fail, they fail!) And they measure response times from gstatic.com, which should have edge nodes near most locations. Shot in the dark guess - perhaps you're hitting some kind of rate limit somewhere in that chain?