Well, she’s certainly fit and trim.
Her 7:09 pace the first 10K is nothing to sneeze at. Although that could also be fraudulent, though it seems more realistic. It puts her at around an hour 33 minutes, which is pretty fast but very realistic for a very fit young woman. I'm a relative slug with a best half time of 1:55, slightly above average.
This illustrates why we see timing mats at multiple places in longer races. It helps guard against someone going "rogue". Someone tried to cheat in the Chickamauga Battlefield marathon a couple of years ago - and got caught. I've run the half marathon there twice, and have helped set up the course twice.