HERE’S A PAGE I USE during design presentations. It’s something I ran into a few years ago and it really works! Read through it and you’ll see. It’s fun—but knowing it does not absolve us from the responsibility of getting the spelling right in everything we publish!
Ed Henninger’s Blog 
Amazing that you put this on your blog today. I was just having a discussion with one of my co-workers today on the same subject. One of our ad people had inadvertently typed “listning” instead of “listening” in an advertisement. We, the newsroom, caught the mistake, but made a comment knowing that most people wouldn’t catch the it because of the word research you mentioned above. Kind of ironic if I do say so myself.
Typos, extra or missing words, erroneous usage, and just plain misspelling are rampant in the flood of verbal content online. Writers are more often working alone, possibly submitting one draft to a content editor (but not a copy editor or proofreader) and then publishing after the ensuing corrections or rewrites. Lots more content, but the details are suffering.