It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. PageMaker including versions of Lorem Ipsum, but the majority have suffered alteration in some form, by injected humour, or randomised words which don't look even slightly believable.
All the Lorem Ipsum generators on the Internet tend to repeat predefined chunks as necessary, making this the first true generator on the Internet. Combined with a handful to generate Lorem Ipsum which looks reasonable.