Frequently I get sensational fluff. OOO Wow! - not all that helpful unless it is a "show off" type thread.
Frequently I get a person who won't answer anything ask for more information then let others follow up. - Sometimes this actually qualifies as very helpful, but mostly not so much.
Some sites I frequent are more about hands on things like building model airplanes (RC and CL) so I'll get a a vast number of often CONTRADICTORY means to achieve the same goal. This can be very hard to filter out the signal from the noise because different ways are not necessarily wrong ways but mutually exclusive sometimes.
5 unhelpful to 1 good response is very good I would say. If that is instead 5 flame bait to 1 serious then that is pretty crappy response. I expect less than 1 in 10 potential flame bait responses or I generally try to go elsewhere as I don't need abuse while online.