This isn't exactly the best way to tell whether or not you should do a thesis or not. You'd need to look at the number of acceptances out of the number of people who applied... unfortunately, the way the polls work, you can't really do that...
What if 5/6 master's non-thesis people were accepted while 9/25 master's thesis people were accepted? That would say a non-thesis masters is better.... on the other hand, they may have the same acceptance rate... This poll is really just telling you what kind of master's people decided to pursue, not which kind the schools seem to prefer... don't all go off and switch your non-thesis to a thesis! haha (4.0 gpa in a non-thesis)