Very good points at the end of your post there. Sample size is so key when you are talking about anything. I always take any results I hear with a grain of salt. We do a survey every year to the parents asking how they think our school district is doing. At the beginning of the next year the big boss shares the results and talks about how people think we are performing. He always highlights the positive saying 90% feel we are doing great. That is 90% of the respondents though. If we have 2600 parents and only 80 of them bothered doing the survey, that 90% is pretty skewed! I always point that out very quietly to my wife :)