People seem to gravitate to music for different reasons; some find the words appealing, some do not pay attention to words, some like it fast, some like it slow and melodic, and for some the appeal is how the music makes them feel. And then again, there are those who have a fairly wide tolerance for many types of music. One thing that I have discovered is that for many people, if they like the performer, they will like the music. Conversely, if for some reason the audience does not like a performer, nothing that person or group does will be entertaining.   In old time or folk music the emphasis is usually on the song or tune. In bluegrass the emphasis seems to be on the performance of a tune or song. Arrangements are a bit more intricate and harmonies more practiced.   While I would think that most Mudcatters would know the differences between bluegrass and folk or old time music, the general public does not seem to care all that much and refers to almost all acoustic music as bluegrass. At least neither bluegrass or folk performers have succumbed to the practice driving pop and country music these days - that the least essential element in music is music. That it is far more important to express attitude and seduce the camera.