Wish I had taken a look at the magazine's name, all I know is it was October 2010. But they had an article that explains a lot. It was a survey and one of the questions was who is Emily Post. Thankfully most people didn't say the owner of a cereal company but more then 60% of "younger" readers 18-34 didn't know who she was.
That really explains a lot. I'm not saying that these readers don't have manners. If you need to write a thank you note, the internet is a great resource and if you type in manners into yahoo's search engine Miss Manners and Emily Post are on the first page. The question is, do you know when to write a thank you note?