another factor, mentioned before, in getting the pirate copy of a book out is how much people care about the book. Not many really give a hoot about E1 Death's Reach, so no one is really taking the time to scan it. Scanning is slow and BORING! I worked at a library one summer archiving books using the same methods the pirates use, at it takes about 45-60 seconds to scan 1 page. Then, add anywhere from 1-2 additional hours for additional processing. the pirates either need to have no lives, or wait until they have a fat chunk of time to kill
personally, I think pirate copies will come out sooner and sooner as the pirates refine their techniques for scanning (faster, more efficient, lower size, etc).