"The most progressive pop album ever"

[terrei]

This is one of the most profound events of the group's history, and yet I've never seen it discussed anywhere. Three questions that should be answered:

1) Who came up with the idea to promote Pet Sounds in this fashion? Derek Taylor?

2) Did this line inspire the notion of "progressiveness" or "prog" in popular music discourse? (I'm aware that there was such a thing as "progressive jazz" before this point.)

3) Is this the earliest reference to "progressive" pop/rock music in print? If not, then at least where "progressive pop" was coined?

[Juice Brohnston]

I was surprised to find a fairly comprehensive Wikipedia page on Progressive Rock/Pop.

If you are willing to take it as a reliable source, They tend to focus on The Beatles as being the real movers and shakers of the movement.

In terms of Pet Sounds, the emphasis seems to be more on how Brian paved the way for acceptance from the 'Labels' to allow artists the range and autonomy to experiment with progressive sounds in the studio. A valid point, I suppose.