A lot of people think so. It just depends on what is important to you. I'm never selling my Thiels. I can't be sure that I like them because of the time/phase coherence but I have no interest in changing. There's a lot of discussion of this on the Thiel thread. The theory is that when the wave gets to you in its correct form your brain doesn't have to do a bunch of work to fix the distorted signal, and you can just relax and enjoy.
Vandersteen Speakers.. Are All Other Speaker Makers Doing It Wrong ?
Never listened to Vandersteen speakers but I will go listen to them now