My Flambeau/Lowden changes regularly between DADGAD and EADGBE (and occasionally EADEAE) without any settling time at all (except with brand new strings but I use the gentle pull method described by Jed to help them settle more quickly). It is however 18 years old and has been played hard and regularly all through that period so the guitar is pretty stable.

My Lakewood has only ever known DADGAD so I can't comment on its properties in this regard.

Peace

mooman