This lament from a beginning banjo player: "I ordered the clawhammer for complete ignoramous book (apparently I am one) and this book which I thought was a beginner book and would use standard tuning starts out with 10 songs in double C tuning followed by 10 more in Sawmill tuning and then six in G tuning (four of which I already know) then on to C minor tuning cumberland Gap tuning (can't it be played in G?) and on and on. Really?"
So now you know why any bluegrass band seems to spend more time waiting for the banjo player to tune up than they spend playing and why banjo players spend half their life tuning and the other half playing out of tune ;).
-- Badtux the Tongue-in-cheek Music Penguin