He quotes Patton. It's worth remembering that Patton was not in overall charge of the war in Europe. Eisenhower was. Eisenhower, who was a logistics officer by training and background, had a basic plan for winning in Europe - build up a mountain of resources so large that the Allies could roll over any possible opposition. Which is what happened.
Eisenhower put Patton into play when a part of the operation needed speed and violent execution. Eisenhower took Patton out of play when it didn't.
"Patton", the movie, shows it from Patton's perspective.
"You will not find it difficult to prove that battles, campaigns, and even wars have been won or lost primarily because of logistics." - General Dwight D. Eisenhower
More detail than you probably want - Gen. George C. Marshall's comments after the war.[1] See p. 8 of the transcript.
A more modern perspective - "Moving Mountains", a book by Gen. Gus Patronis, head of logistics for Desert Storm. How the U.S. Army built up a massive force in the middle of nowhere and then won a war in four days. This is a useful perspective on "speed". If you want to go fast, having massive resources available makes it work.
Eisenhower put Patton into play when a part of the operation needed speed and violent execution. Eisenhower took Patton out of play when it didn't.