Here's the interesting thing about this poll: if guys that are asking the question or the guys who are worried about their size wouldn't have voted, it'd be almost a landslide to "no".
The thing here is that people are voting yes because they know that it concerns guys personally. If this was a scale, such as "do girls really care about penis size, or do they look at other factors too?", the poll would be much different, and would probably lean to "no".
Most of those "yes" comments and votes are coming from guys who are concerned themselfs or know that it does matter for other guys personally.
So really, this poll isn't all that acurate