I just got a response on a JD Power and Associates survey I completed yesterday. It was only 2 points- I don't know why I bothered- but the response was that it had been flagged as having been completed too quickly. (Note that the message I had gotten when it was 99% completed was the generic "we have enough responses from your category" answer.)
The survey included many text responses and I supplied thoughtful answers. I read quickly and many questions are predictable so I can answer them readily. The process is also faster for me because I'm retired and a household of one and for the initial "Do you or anyone in your household work in the following industries?" is a quick No regardless of the industry list.
I'm wondering how many other occasions where I was kicked out near the end were because I complete surveys faster than expected.
So... when taking these surveys, get up, walk around, have another cup of coffee. I need to remember that.