Perhaps, perhaps not. I would think that even IF they do work in Fremer's room....they would work a heck of a lot better in a much larger room.
Surely. But, unless people are in forums just to denigrate the high-end reviewers, they will read the opinions of the several reviewers who listened to them in a few different spaces and merge their opinions. MF uses the XLF speakers as a tool for reviewing and for his own listening. He is very clear in his review "Had Wilson Audio Specialties been looking for a space in which to demonstrate the efficacy of Dave Wilson's group-delay technology, in particular the Aspherical Group Delay adjustability (see below) implemented in the Alexandria X-2 and the new Alexandria XLF, they couldn't have found one more challenging than my listening room, which measures only 15' by 21' by 8'. " .
The XLFs were also reviewed by Jacob Heilbrunn in TAS in a very large, well treated space. David Wilson has been careful to get his best speakers reviewed in different situations - and the XLF is abundantly referred in press in different rooms. Unfortunately some people love the gossip, but seem to ignore the reviews and just comment on post quotations.
As always nothing surpasses our own auditions. Although I only listened to the XLF in great spaces, I have listened to X2 sounding great in a few limited size spaces.