If I erased your knowledge (and everyone else's) of what the kewl kids had classified as "good art", would it grow back? Would you eventually re-recognize the same works as being good, with the same relative merit, for the same reasons?

I imagine that the answer to this is yes for a great deal of art. I don't know much about it myself, but when I think about art that I like I can find reasons aside from cultural significance or peer pressure.

This assumes the question is ignoring the lens created by my limited expose to art. I highly doubt that any of the artists I like would have been experienced by me if others hadn't considered them worthwhile.

Music is an easier analogy for me to make. I can more accurately describe what I like in music because I know a few more terms. But also, when I listen to a song, I find that my opinions are more distinct. I assume this is because my tastes are becoming refined; I am open to other interpretations.