I like plain talk and I like "Plain Talk"; thanks, Alex. Also, a pretty good example of early "soul jazz" with the Hammond B3 featured. Aside from being an enjoyable listen, I find this cut interesting for a couple of reasons. The first reason goes to what I think you mean when you say "Perhaps not the type of music you would expect just by looking the names on the cover...". Mitchell and McLean (alto and not credited on YouTube) are beboppers all the way and their facility with faster tempos and extended solos highlight the "limitations" of Quebec who was much more of a traditionalist with a sound that was less modern and which evoked the swing and blues players. The other reason is just speculation on my part and goes to what you point out re the date of release; recorded in 1960, but not released until 1968. Maybe strictly a business decision due to the peak in popularity of the style in the late 60s. From the Wiki article on "soul jazz":
**** Soul jazz developed in the late 1950s, reaching public awareness with the release of The Cannonball Adderley Quintet in San Francisco.[4][5] Cannonball Adderley noted: "We were pressured quite heavily by Riverside Records when they discovered there was a word called 'soul'. We became, from an image point of view, soul jazz artists. They kept promoting us that way and I kept deliberately fighting it, to the extent that it became a game."[6] While soul jazz was most popular during the mid-to-late 1960s ****
**** Soul jazz developed in the late 1950s, reaching public awareness with the release of The Cannonball Adderley Quintet in San Francisco.[4][5] Cannonball Adderley noted: "We were pressured quite heavily by Riverside Records when they discovered there was a word called 'soul'. We became, from an image point of view, soul jazz artists. They kept promoting us that way and I kept deliberately fighting it, to the extent that it became a game."[6] While soul jazz was most popular during the mid-to-late 1960s ****