Per the Pew Research Center, the fastest growing Internet User demographic is the 70 year old and up crowd. This is both amazing and fantastic and shows the true power, compelling nature and ubiquity of the Internet. Here is an eMarketer report that summarizes the finding: The Online Generation Gap Narrows.
This report also points out that when you are developing your social media and interactive marketing plans you must consider all demographics, not just the 25-45 year olds.
Also, through simple observation of my 90 year old grandmother as she emailed her friends and performed online banking and financial services management, I knew this had to be the case.