When I see 'then they plugged in the Wowee cables and I immediately heard a distinct improvement in the ......' that tells me the difference is so obvious, even with notoriously poor long term audio memory, that an ABX (which is a sensitive listening test) should be a snap. In theory you are correct, of course, but in practice even tiny audible differences in A and B will often cause the results to swing quickly.

In tests where noise or distortion are introduced to one source as an experiment on thresholds of audibility the swing from ~50% to ~100% typically occurs over a fairly narrow range.


Charlie