As noted before, it's tough to know that 100% of the responses are truthful on any survey. With PickFu, you can read the explanations to get a feel as to which respondents put some thought in.

I'm sorry you had a rough experience with that specific music-listening job - we've never had a more time-consuming question submitted. Most are in the order of "which site do you prefer?", like this current one: http://pickfu.com/AGSIBT. These get answered far faster by the MTurk workers.