This provides some justification for my mildly anti-urban-park bent. Often when people support parks what they're supporting is an empty lot with some grass and trees which isn't really meant to be used be humans. There's nothing necessarily wrong with adding a bit of pastoral into an urban setting, but it often isn't really the best use of land either. I'm all for playgrounds, performance spaces, playing fields for sports, places with lots of benches and tables, etc... but tend to be less than supportive of prettified empty lots.
As for the other patterns of preferences at the link, I think they suggest that people don't have a good understanding of tradeoffs that must be made in order to achieve desirable walkability.
