Yes, I have a April 2011 EX CVT which has covered just 5000 miles since new. The noise you describe started yesterday and I would agree that it is on the nearside suspension, over speedbumps.
My previous car, a 2010 EX I-shift made exactly the same noises during the cold spell last year.
My dealer did have it in for an hour or so, and 'lubricated' something which cured it, for about a week!!
However the noise did disappear when the warmer weather arrived.
I will probably leave things now, until after christmas to see how it goes. If the noise is still there then I will go to bat, again!
It would be interesting to see if anyone has a solution, as whilst I agree one could just disregard the noise and turn the radio up, the problem should just not arise on a car of this age and quality.
Merry Xmas to all our readers.