This post from a book seller can also apply to savvy companies that like to engage with their customers in clear English: http://www.book-fair.com/blog/en/2011/09/12/everythink-sam-missingham/

American research has found that more people share links, articles and ideas on FaceBook and Twitter if the language is clear and to the the point: http://www.briansolis.com/2010/05/facebook-sharing-driven-by-simplicity/