well, there's this from TVH:
SPOCK: Your use of language has altered since our arrival. It is currently laced with, ...shall I say, ...more colorful metaphors. 'Double dumb ass on you' ...and so forth.
KIRK: You mean profanity. That's simply the way they talk here. Nobody pays any attention to you if you don't swear every other word. You'll find it in all the literature of the period.
SPOCK: For example?
KIRK: Oh, the collective works of Jacqueline Susann. The novels of Harold Robbins.
SPOCK: Ah! ...'The giants'.
Although in quotes here, Spock in no wise speaks in a way that calls his use of the word "giants" into question. He means that Jacqueline Susann and Harold Robbins (20th century writers of dreck) are literary giants in the 23rd century. So unfortunately, while funny, this usage isn't 23rd-century enjoyment of 21st- century entertainment for the hoi polloi (although that's what it is to us), but the 23rd century elevating 21st century-shite to 23rd-century classic status.
I always found Spock's 'giants' comment to be rather sardonic. Even if that's not the case, though, I think it's a very poor interpretation to say he means that those authors are literary giants in the 23rd century. At the absolute most, I would interpret it as him believing that those authors were the most popular authors of the 20th century.
Why (a poor interpretation)? Frankly I don't see any other. It sounds just that way to me...every time I've hard it:
http://www.youtube.com/watch?v=7WTvEbUkeLM
The humor is that two popular writers of trashy stuff have become giants of literature by the 23rd century. From Spock's delivery, I don't see any other alternative. Also, remember that Spock, just having come back from the dead, was especially literal minded in TVH, much more so than usual. He was not cracking any jokes. Also, when Kirk says "The collected works of Jacqueline Susann" he seems to be speaking of her work as if it's high literature--and trash isn't usually treated to collected editions. "Collected works" is a phrase almost always associated with classic literature of high quality.