I've ended up reading and watching a good amount of Ted Williams over the years, including his book The Science of Hitting, a biography titled Ted Williams: The Biography of an American Hero, and also viewed a couple hours of old videos where he is talking hitting with minor league players.
This clip reminded me of those videos:
Interesting to me that there were many references to the hands and wrists being quick, but no reference made to use of the hips for rotation, which Williams wrote about in his book.
Something that Williams was known for was getting a good pitch to hit, and my favorite line in the clip above is "only hit a good ball". How simple.