Those records were not more advanced than the Beach Boys.
Now, I'm a Finn disciple... but while the BB's ARE above the Beatles to me, I can't agree with that statement... Pre Rubber Soul I think the only albums that stand up to the Beatles LPs are Surfin' USA, Little Deuce Coupe, All Summer Long and Today (Not sure where Summer Days fits in)... Now that is alot, but there still is some dreck on all the albums I mentioned...
I suppose the difference is the fabs SOUND like they put alot of effort into their filler, while the BB's it's so damn obvious it's frustrating...