Surveys are typically designed to collect a representative sample of opinions or attitudes from a particular population. The results of a survey depend on a variety of factors, such as the sampling method, the wording of the questions, and the size of the sample. The responses of individuals are typically aggregated and analyzed to provide an overall picture of the population's views or opinions.
In some cases, individuals who are more vocal or assertive may have a greater influence on the results of a survey if they are able to persuade others to adopt their views and I believe this is what happened here.
Especially that we know that there was a big campaign on the servers and abroad, encouraging other players to go vote for a speed increase where players of the opposite opinion remained mostly silent thinking that the concept of "Road to simulation" would shield them from any changes in the Truckers MP vision.
8000 survey answers is not an impressive result in a 5 million user base, 0.16%