Based on reading and personal experience, think it depends on the application. Some years ago put a set of 215/50-17 DWS on a 3.0L Accord. Morning flat spotting and accompanying vibration unacceptable to me, never had a tire ride that poorly. Tried them for 30 days on DT ride guarantee, took them back and got Michelin Primacy MXV4. Ride difference night and day. No noticeable flat spotting on the MXV4. The RT43s I have on now, as good as the Primacy, no flat spotting or vibration.
Reading some others experiences here, not like mine.