I don't think the comment you are responding to is dismissing it based on the absolute number of responses, but because of the poor response rate. When you hav

I don't think the comment you are responding to is dismissing it based on the absolute number of responses, but because of the poor response rate. When you have a really poor response rate, don't you worry about how it might have biased your sample? People talked about this a lot with respect to political polling by phone during the last US Presidential election. Very few people answer phone polls these days and figuring out how different they are from the general population is important.