No issues
Completed the survey on my iPhone about a half hour ago. They specifically seemed to be asking about my online experience - I tried multiple times to upgrade an upcoming flight using Avios, and it failed multiple times over, telling me to call an agent after I had entered credit card info, once saying that I was not logged in (but being logged in is how I got my booking pulled up) - so I presumed the survey was tied to my website visit, not a general survey. I was fair but blunt in my feedback.