I was talking to my dad about this just the other day. My 14 does the exact same thing you're describing, but his 15 has never made a peep. Its most noticeable if I've got the window down easing through a parking lot but yeah, there's a high-pitched whine when accelerating from a stop, and it gets louder as the RPMs climb. I'd love to hear some suggestions/solutions..keep us updated.
All I know is it's still under warranty