At my first place, a small outsourcing shop, employees were required to log daily activities so hours per day roughly fit to 8 and 40 per week. From the beginning and unlike most of coworkers, I measured my time precisely with https://github.com/Klaster1/timer-5 and soon understood that doing 8 hours per day doesn't happen much and often involves staying late, so instead I simply adjusted the reported numbers to look plausible. In four years, I only received positive feedback on my productivity. What was the management thinking, I have no idea, just like the article says, this was a farce all around.
When I changed the company, the habit to measure productivity stuck. Nowadays, I start working somewhere at 9 and finish at 18, and result is still the same - honest 8 hours of work activity per day happen at best once a month, the average week sums to 30-34 hours. Code-related activities never take more than 3-4 hours per day, that includes both coding and reviews. I get the impression that some of my colleagues might spend more time on the job, but low productivity was never a topic of my performance reviews, management seems content with what they get.