I hesitate to call Alex Ross wrong on anything. But upon closer examination, it appears that he has seriously erred in his description of the “presidential chord,” which I referred to below. Perhaps he was misled by the otherwise excellent posting of J.D. Considine.
Bush’s fingers are not placed on the lower E and A strings, as someone attempting to play a G-major chord might do, but rather on the A and D strings. Thus, he seems to be playing the notes E (unless his thumb is touching the low E string, perhaps making a buzzing G-sharp), C#, F, G, B, G#.
This has monumental implications, as Ross will surely agree. Bush’s pitch series does not have a Forte number of 6-Z11, but rather the very different 6-Z49. Instead of “a hauntingly ambiguous chord that brushes against the ghost of a now defunct tonality even as it stares ahead remorselessly into the chromatic future,” it seems to be suggesting something rather different.
Turns out Bush really was just being a jackass.