They ask the same question regularly, statistically significant changes in answers are very noticeable. Also if people really liked WFH wouldn't they say they were more productive now to try to alter future decisions? But instead people choose to answer that they are less productive.
"only 31% of the company’s engineers polled felt they had been highly productive, down 8 percentage points from a record high in the March quarter."
So 8 points down from a record. What is the usual variance on that statistics? Doesn't say much.
And like ... are employees really honest when asked 'anonymously' by a surveilence company how much they work?