I have noticed this among college men. Twittery, chirpy--upward inflected at the end of a declarative sentence? Every statement a question? Statements turned into questions as a plea for approval and tolerance?
Ick. It's like swishing and wrist-flapping, but these are heteros of which we speak. speak?
Ne Zot! My husband listens to NPR ... THAT's where he's getting this obnoxious speech pattern. It makes me want to scream!