I do think the phrasing is weird, though. The performance may be improving, but it isn't the thing getting "faster" (e.g. responses to queries might get "faster"). And the dollars aren't getting cheaper; the performance is. "Performance per dollar" is a rate; it is not getting faster or cheaper. It should just say "Performance per dollar is increasing".
The old headline was something like "We served GLM5.2 on AMD MI355X at 2626 tok/s/node". They think it's bad to advertise performance numbers like that without specifying how much you quantized the model (Since you can 'cheat' more performance by quantizing more, and not mentioning the reduced output quality)