Susan from Fairytale in Supermarket called this "tacking on" after the fact in an interesting convo we had that ended up being about some of this stuff (seemed in a similar orbit to Frank's "What's Wrong with Pretty Girls" column). I agree with her that this is a common tendency, but I definitely wouldn't ascribe it specifically to what she's calling "poptimism," certainly not as a rule. (Bigger problem being that I don't think poptimism has any set-in-stone "rules.")