"Rack"?? As in singular?
Depending on how counted, there's dozens or hundreds of racks behind his listening seat. The room extends well behind his seat much further than it does in front of it, and his Wilsons, although out from the wall a bit, aren't that far out. He sits in a kind of mid-field environment, although (from memory there's likely at least 8 ft. from the seat to each speaker (that's from memory, but it could be up to 10 ft.).
No, it doesn't create a problem for the imaging. It's images like a sonofabitch, but that's not the focus of the system. It's not like some giant Martin Logan system where sh*t has to float around in all directions but there's no musicality. It's got a great sense of stage, both in width and depth (when the recording provides it), it's very even-handed, dynamic as all hell, fast, taught, transportive, smooth and enjoyable. It's definitely one of the better systems I've ever heard and in it's own, really expensive way, understated (if that makes sense). IT doesn't try to call out to itself.