On the other hand I have heard more than once people who do sometimes very secretly confess they wish their cousin/brother/etc with Down's had been aborted. They always talk about all the love and joy and positive things too. But at the end of the day, they say, they think they would have preferred it the other way. But this is not pretty, and it's not something people like to talk about. So if you just take what people say in public, you maybe don't get accurate representation.
Maybe the people I know are not good representation of the population, though!