[NeroASERCH]

10 out of 400 is not bad. If you invited 4000 people 100 of the printouts would have been taken. That is 2.5%. In general if you get 5-10% response (without any incentive) for any survey that is considered good. The survey takers project the general response from that small sample. I used to run the local branch of the American Chemical Society in South Bend, Indiana. For the meetings I organized only 5-10% of the membership would show up. Keep in mind that most of the members had Masters and Ph.D degrees. That was considered a successful meeting. The whole population's behavior can be picturised on a probability curve. The majority of the people fit into the central band comprising 80% whom we can characterize as just neutral or apathetic. 10% at one extreme are extremely mindful of issues important to them. The 10% at the other extreme would not care if the sky caved in in their front yard. It is a rough modification of Pareto's rule (Pareto invented the 80:20 ratio in most human endeavors--20% of people do 80% of the work and so on). 80% apathy, 10% empathy, 10% antipathy (which amounts to hatred and even ridicule of anything you say or do) fits the general pattern.