Do listeners really spend 20-30 minutes answering a survey with no reward or incentive other that to provide the station with their
opinion.
For example Jacob's media regular survey for their client stations:
http://wgnradio.com/2015/01/29/wgn-radio-wants-your-opinion/
I received one of these in my email as a CHOM-FM newsletter subscriber here in Montreal ... 20-30 minutes is a lot of time, even if you can save your answers and come back to it.
It has been my experience with customer surveys in other industries besides radio that people with a certain, specific personality profile will complete these surveys. In fact, the people who enjoy taking such surveys go out of their way to find surveys to take. There are some survey clearinghouse websites that actually collect avid survey-takers. This goes for all such customer surveys, including those on checkout receipts for grocery stores and fast food restaurants.
Because the people who enjoy taking such surveys have a unique and distinctive personality profile, their opinions are skewed by that personality profile. Any business that takes the opinions of such a unique and distinct psychographic group as being typical of all customers will be working on misleading information. There is also an observed tendency for those who enjoy giving their opinions in surveys like these to want to ensure that they are asked for their opinions again to slant their responses to what they think the people conducting the survey want to hear.
And of course, there are also pranksters who love giving fake answers to such surveys just for the fun of it.
That's one of the reasons why I have such an oft-repeated disregard for any business decision that the people who made the decision attempt to justify with the claim that the decision was based on "research". It was, after all, carefully conducted consumer research that lead to the introduction of both New Coke and Crystal Pepsi, to name but two of the many, many failed products that were the result of similar research.
If anyone is a fan of old Britcoms, they might have seen the episode of "Yes, Minister" where Sir Humphrey Appleby demonstrated to Bernard Woolley how easy it was to craft opinion poll questions in such a way as to produce whatever result the person writing the poll wanted to achieve. It's not all that difficult.
I went to the survey linked in the launch post and went through some of it. It's vague enough that one can easily get into a "groove" of just hitting the middle answer for almost every question. It's also vague enough that what one person means by "some" might be very different from someone else.