By your logic you can't buy an ID brand then. That would give you an agenda (and so does the rest of your post). YOUR EARS, as you so lightly put, are not bias free, nor are they accurate... at all. Measurements conducted in a proper manner are the best way to see how a subwoofer/speaker/piece of equipment performs. You can't hear everything a microphone will pick up.
You say the subwoofer shook a couch... that was right beside it. Wow! If it DIDN'T shake the couch, it should be shot. BTW, accurate, truthful specs, like the ones provided with most ID brands, are what sell the products, because the buyer knows he's not buying bullshit.
SheepStar