They measure the "quality" of review based on time spent looking at the code which suggests to me they have absolutely no idea why they are making people do code review at all.
This is an especially bad metric because
1) We have good data that after about 60 minutes of reviewing we start to lose the ability to find more issues.
2) It incentives making bigger and harder to review changes so that people spend more time looking at the code.
You seem to suggest that the team is trying to increase eyeball time metric, but that isn't what the post said. The post said that they wanted to decreases the time to review metric, but without changing the eye ball time metric.
This is an especially bad metric because
1) We have good data that after about 60 minutes of reviewing we start to lose the ability to find more issues.
2) It incentives making bigger and harder to review changes so that people spend more time looking at the code.