I think the problem with a resource like that would be the fact that perception is subjective. Also there are a bucket load off factors that will dictate how different each driver is presented sonically.
For example would every who submits opinions to this resource be using the same method for appraisel for each driver? Some people might not have an adequate test enclosure, while others might not even use one, room environment would also play a major role inhow a speakers sounds. E.g what sounds good in my room might sound likke rubbish in yours, regardless of the enclosure.
It would be nice to think we could rate the sonic permance of drivers independant of scientifically measurable attributes, but unfortunately for the most part all descriptions of sonic characteristics could be summed up as either good, bad or indifferent.
Now I stand back and await correction
cheers
Dr F