I wrote a blog post http://williambswift.blogspot.com/2009/08/akrasia-as-reveale... , partially in response to a Less Wrong thread, where I wrote "Complaining about akrasia, the lack of will-power, to get done what you want to do, may show that your real preferences are not those you are claiming." So maybe what the research shows is that the participants have a limited amount of BS they are willing to put up with; they just want it to get over with rather than focusing on the rest of the study.