I really didn't notice any increase in road noise up to 75MPH on the way home and I don't have any rear interior, either - no foam/vinyl floor, no plastic panels, etc. So mine is already a bit noisier than most cargo vans here, but not loud by any means. I did get one pic before leaving work with a parking lot light plus camera flash for some brightness.
Edit: Oh yea, I also noticed they don't break traction as much on pavement or gravel. Same situations that had the traction control going crazy before, even when the Conti's were younger & meatier than now.