I am not sure how many don't use a "start" menu (i.e., either 3rd party or metro) for the most part, but maybe they will identify themselves, and, if they voted, indicate how they voted.
At this point, your poll results might be interpreted, for example, as follows:
Yes (uses a 3rd party start menu predominantly) = 6
No (uses metro start menu predominantly) = 7 less 1 or 2 = 6 or 5
No (uses something else predominantly, e.g., a toolbar of shortcuts) = 1 or 2
Of course, this interpretation is not completely without problem.