Definitely good to know that it might take a bit longer than we had estimated from earlier respondents (with the well-taken selection effect caveat). 

Note that if it takes between 10-20 minutes to fill out, this still works out to donating $120-240/researcher-hour to high-impact alignment orgs (plus whatever the value is of the comparison of one's individual results to that of community), which hopefully is worth the time investment :)