Pinky and Perky didn't go on to greatness.
truly, this is a great tragedy.
However, speaking of the Beatles' rise in America, I don't think it was so much a matter of hype as the peculiar niche markets that America has. What the Beatles' recordings went out on were tiny little labels that didn't have any distribution. I assume that America worked then pretty much the way that it works today; if you don't get the promotion, you don't get the airplay. If you don't get the airplay, you don't get the sales. If you don't get the sales, you won't get any promotion money or airplay! It's interesting that the markets in which the Beatles
were introduced by a few rogue DJs (Washington DC, Chicago, New York) generated sales and led Capitol to increase its first pressing of "I want to hold your hand" by about 200%-- fortunately!
I think the Beatles were exposed to a national audience in England much sooner than they were in America-- right at the time that "please please me" was going towards number one-- simply because England had a much more unified mass media system. In America, the Beatles had no national exposure for their first four records. The Ed Sullivan show gave them that exposure, and then their records took off nationally. Fortunately, Capitol had pressed enough that they could support the boom. I don't know what these little labels did; they must've been pressing round-the-clock!