From the article: "The tank-destroyer force was the Army’s response to the wild successes of German armor in Poland and France in 1939 and 1940. Panzer divisions would concentrate more than a hundred tanks on a narrow front, overwhelming the local anti-tank weapons of defending troops and rolling deep into enemy lines."
That simple eh? According to David Irving in The Trail of the Fox, Rommel actually did that after Dunkirk, driving south into the heart of France: "He had thought up another brilliant new idea, the Flachenmarsch or 'formation drive' in which the entire panzer division steamrolled across the open, undulating countryside in a box formation...Up hill and down dale they rolled,around the villages, through the hedgerows[?!]--spewing fire and leaving behind pillars of smoke and wrecked enemy equipement..."
Wonder what would've happened if they tried that at Kursk