But anyways, you are complaining about a few watts, on specs that were an estimate, for a machine that didn't exist at the time, and is just being "made" now.
You are missing the point. Bitmine could miss their targets, and I wouldnt necessarily call them liars if they do. But if Im going to resell bitmine chips or build gear around their chips, and I put numbers on it that are impossible with bitmine's specs, then Im lying. If you like car analogies so much, its like BMW advertising their new electric car will have a range of x miles, and a dealership taking preorders claiming it will do twice that (and claim to take delivery of the cars before even BMW says it will manufacture them).
And no, even 600W is not possible at the wall at nominal speeds if bitmine hit their specs. PSU's, VRM's and the rest do consume power, thats a fact, not an estimate.