Aczel gave the various TW good reviews. It was the first I'd heard of the brand. Peter was a proponent of drivers wired 'in phase'. In his opinion, that would result in reproducing pulses more accurately, all things being equal, thus resulting in a better sounding loudspeaker.
I think for him the idea came from (I'm guessing) his time with the Rectilinear Research, and his association with computer engineer Bruce Zayde, the latter responsible for the design of Fourier loudspeakers. At least through the mid '80s, when that company closed up shop and Zayde went to Hewlett Packard.
By the time Peter resurrected his magazine, he had mostly abandoned that specific design criteria as being much of a concern, given other aspects of loudspeaker design parameters.