Jazz educator Dariusz Terefenko has pointed out the speed and intricacy of "Confirmation's" "harmonic rhythm" (the rate and manner in which chords change underneath the melody), which he notes is typical of the bebop era.
[4] Martin Williams, writing in Down Beat Magazine in 1965, described "Confirmation" as a "continuous and linear invention"—in contrast to the construction of typical pop or jazz compositions, it skips along beautifully with no repeats.
Gioia wrote that "Confirmation" and Parker's "Donna Lee" could "almost serve a primer in modern jazz phrase construction".
[7] The jazz singer Sheila Jordan sang a vocal version of "Confirmation", with lyrics by Skeeter Spight and Leroy Mitchell.
Both pieces use an "AABA" thirty-two bar form, and the "A" sections of "Confirmation" closely match the harmonic progression of "Twilight Time."