Do Twitter people spell better?

Just got a press release from with results of a study that Twitter users, on average, actually spell better than the average schmo.

The study was conducted last week and consisted of one hundred random*, English-speaking participants who either identified themselves as users or non-users of the Twitter service. Each group was then asked to write 100 words about what they did that day.

He found out that while Twitter users maul the grammar, they seem to spell well—once they’re operating outside the cramped confines of 140-characters. But why would they (or we, since I’m a Twitterer)continue to cut corners on grammar outside the Tweet box, but improve the spelling? Ideas?

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