Ever since Elvis began his famed recording career with a Rockabilly cover of Bluegrass Bossman Bill Monroe's signature "Blue Moon of Kentucky" Bluegrass has been regarded by *some* as the poor barefoot hayseed step-child of Country Music.  Acoustic Guitars and Banjos and Fiddles were overwhelmed and swallowed up by Electric Guitars and Peddle Steel Guitars.  A successful Bluegrass album sold maybe 30,000.  The "dirty little secret" in Nashville was that the Bluegrass musicians were the ones who could really PLAY, so talented bluegrassers who wanted to make a decent living became Nashville studio musicians.  Bluegrass fans, who are often as fanatical about the music as a religious zealot is about their religion, considered such musicians to have "sold out", and so it was that artists like Ricky Skaggs, Bill Keith, Marty Stuart and Vince Gill were considered.  Once big fish in the small Bluegrass pond, they were thought by Bluegrass Purists to have compromised their artistic integrity to become Country successes. (Was it ironic that Ricky Skagg's first Country Hit was a "countrified" version of Lester Flatt's "Don't Get Above Your Raisin'?")