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I have never seen a review with lateral dispersion or polar response charts to show this bubble of sound from this sort of crossover. It would be interesting.
Pat McGinty used to have a finished speaker rig allowing him to move the tweeter back and forth and thus demonstrate time alignment, but some people claimed the methodology could be altering cabinet diffraction or lobing as the position changed. (In other words, the same validity questions the report here raises about the demonstration of cabinet materials and damping.) This was back before production type speakers came with adjustable heads, as we see from Focal and Wilson and Vienna Acoustics, etc.
Mr. von Schweikert has always had a slightly different assessment of time and phase alignment from the old Thiel and from Vandersteen, in that he thinks the threshold of audibility for delays is around the four or five millisecond mark.
I'd love to get a good pair of VR2 speakers on the used market; they always seemed to occupy a real sweet spot in the floorstander market.