Well, true stereo...fake stereo, I guess it's semantics when it comes to CD releases.
The stereo CDs are not always the same mixes between old CDs and new (or LPs). It gets very confusing, really.
George Martin remixed
Help! and
Rubber Soul when the albums were first released on CD in 1987. Even though
Rubber Soul was recorded on a four-track machine, most of its songs have that unlistenable mid-60s STEREO separation with vocals on one side and instruments on the other. Martin remixed the album to bring the vocals down the center. The new stereo remasters use the 1987 George Martin stereo mixes rather than the original 1965 mixes (the original 1965 stereo mixes are in the mono box).
Confused?
From the always accurate and never wrong wikipedia:
The Mono Box Set was released to reflect the fact that the Beatles' catalogue (aside from Yellow Submarine, Abbey Road, and Let It Be) was originally released in mono, in addition to stereo. Many feel that the these mono mixes reflect the true intention of the band. For example, in the case of Sgt. Pepper's Lonely Hearts Club Band, all the mono mixes were done together with the Beatles themselves, throughout the recording of the album, whereas the stereo mixes were done in only six days by George Martin, Geoff Emerick and Richard Lush after the album had been finished, with none of the Beatles attending. George Harrison commented:
"At that time [...] the console was about this big with four faders on it. And there was one speaker right in the middle [...] and that was it. When they invented stereo, I remember thinking 'Why? What do you want two speakers for?', because it ruined the sound from our point of view. You know, we had everything coming out of one speaker; now it had to come out of two speakers. It sounded like...very...naked."
For me, that last quote there sums it all up. The Beatles, for the most part, are a
pre-stereo band, and that's how they should be heard.