Ha!
I'm on a Brown/Roach kick, which inspired me to post this thread. The coda of one of the tunes has Richie playing five-note major chords in fourths - the five notes of the pentatonic scale - and it indeed sounds very like the kind of thing that McCoy would do in later years.
It's interesting when you consider that this kind of voicing was done frequently with strings on pop records of the 1950s, often conveying a happy, optimistic, bustling metropolis kind of sound, but when jazz pianists started using these very same voicings in a jazz combo setting, they took on a completely different vibe.
Yet another reason that the five notes of the pentatonic scale are so amazing and versatile.