Here's a quick one to make up for my absence yesterday. I'm feeling much better, thank you, and the urge to eat human flesh is beginning to subside. This is from a press release, but it contains some interesting figures (assume this is for North America only):
E-book consumers are becoming more diverse in their format preferences, says the Book Industry Study Group (BISG)'s closely-watched Consumer Attitudes Toward E-Book Reading report. The third installment in Volume Three of this Bowker-powered study -- available today -- shows that the percentage of e-book consumers who exclusively or mostly purchase book content in e-book format has decreased from nearly 70 percent in August 2011 to 60 percent in May 2012. Over the same period, the percentage of survey respondents who have no preference for either e-book or print formats, or who buy some genres in e-book format and others in print, rose from 25 percent to 34 percent.
Some other figures relating to the breakdown of e-reading devices can be found at the original, here: http://www.bisg.org/news-5-779-press-releasee-book-consumers-diversifying-their-format-preferences-says-new-bisg-study.php