[DharmaPolice]

I think it's more of a negative indicator. It's like turning up to a job interview wearing dirty clothes - unless you're a savant it's probably indicative that you don't give a shit or have some sort of other problems in life. But wearing clean clothes doesn't give you points because it's assumed to be the norm in that setting.

[dd8601fn]

Right. Clean house on the market means almost nothing.

Gross house means almost certainly not maintained.