Similar to the key changes thread - I had noticed in the past that Joanna frequently uses certain chord progressions, although I have forgotten all the examples. The first time I noticed it was while transcribing Sawdust & Diamonds - the middle "Longface" section uses the same chord progression as the "oh my love" portions from Bridges & Balloons.
More recently, we all know that Does Not Suffice is a refrain of the middle sections of In California, but did you know it's also the same chord progression as Baby Birch (I - IV - vi - IV)? And all three are in D major...
...but I'm not calling her a one-trick pony! These are just JNew signatures, like the tango rhythm she brought about with Book of Right-On and "En Gallop" that's in MANY songs in HOOM. Kind of like how Debussy sounds like Debussy and Copland sounds like Copland... if she ever moves into wordless orchestral works, it'll be easy to spot a Newsom... : )