This is an all around well-done study. Not only are the results statistically valid, but they provide relevant information that their subjects can use. Knowing that over half of the companies use blogs are in the top 200 of the list, we will probably see an increase in blogs over the next year by companies. It shows just how much research findings can have a impact on the real world.
Research Link: http://news.sncr.org/news.php?include=143901