Question for all you bluegrass guys and gals (and it's a serious question).

Is it considered a 'good' thing in bluegrass to do the song the same way everytime?

Let me explain. In some Inuit art (sculpting), it is considered the sign of a good artist if he/she can exactly duplicate the work of an older, more accomplished artist. I guess I'm asking this: Would it be considered a good performance to exactly do a song as an older, respected group did it? Am I making any sense to anyone?