I put a set of these on yesterday to replace my Michelin Pilot Sport A/S 3s and recorded a before and after (same road, same weather conditions and speed (45mph)). These recordings were made on my phone, holding my hand in roughly the same spot for both recordings, but, obviously not at all a scientific comparison.
My conclusion is that they are indeed quieter under these conditions, but, not by a huge margin. I do think, however, that the pitch might be a bit different. As far as handling goes, the tires are still too new to really get a read on them, but, so far I don't notice much of difference which is a good thing. Overall, I'm really pleased with these so far.
Here are the audio recordings so you can see for yourself (note, the Michelins were pretty worn down by this point, so, it's not exactly apples-to-apples):
https://s3.amazonaws.com/uploads.jfoxny.com/Bridgestones.m4a
https://s3.amazonaws.com/uploads.jfoxny.com/Michelins.m4a
Side note: The Michelins lasted 21,726 miles with a total energy rating of 7,515 kWh and an average energy rating of 346 Wh/mi. Your mileage may vary.