Yes, that sounds exactly how PW would respond. In fact, waaay back, I had the wonderful opportunity in meeting him, again as a student in London's 1st division playing for Kingsbury rugby, first 15 team. It was a fairly enlightened encounter. His rep Stan, was trying to introduce me from Sri Lanka, saying that I was a big fan of Quad and dedicated dealer of Quad ESL's... PW had a slight hearing issue, so he asked what...!!!? Stan said, "he's from Sri Lanka... tea, tea!" Then PW goes "oh! Cheese! From Swaziland!" So thereafter I was known as the dedicated Quad ESL distributor from Swaziland who specialises in cheese... uh?
That's, ok I guess, I didn't go any further to try to correct PW, I just accepted that he was quite frail and getting on... few years after he passed away. He was an absolute legend, perfected the ESL to deliver such a superb midrange that even to this day, the majority of speakers simply can't match no matter how high tech they are. And that's exactly why I just adore electroststs!
It's different physics as you say, and box types or horns just can't deliver what stats can... that's different physics at play again.
Cheers mate, and most of all, enjoy those fine tunes!
RJ