Generation Y

[Elder Iptuous]

...
When I read the descriptions of GenX or GenY, and especially GenY, I get the idea I'm reading a horoscope, like it could apply to anyone.

Yes.
it is particularly like the chinese zodiac where everyone born in the same year shares the same traits. 
(do the school teachers in china say to themselves, "oh shit, we've got a batch of cocks coming in next year. i can't abide those little fuckers! I'm out!"?)