I've had the same experience as Mr. Wood, I've made more then a few freesites with 300+ words on every page and never had problems with LL because of it. Although MML did describe it as annoying a couple times.
In fact, for a while it was standard practice for me to write 200+ words of unique text on every page of every freesite, including mirrors! But it took so long to make a single freesite the overall return was effected by a lack of raw numbers.
IMO, a few lines of unique text on each page is all that's needed. And, it's an easier habit to maintain.