Twitter users have been bracing for impact ever since news broke that Oprah Winfrey had joined and would publish her first tweet today, during a taping of her show. That initial message came through, revealing that Oprah wasn’t completely up to snuff on netiquette. Her initial post was an all-caps message, as she referred to her followers as “TWITTERS.” Now, Shaquille O’Neal has been on Twitter for quite a while, and has called out celebrities for using ghost writers and for other lacks of transparency on the service. When it came to Oprah, he had to call out her caps usage. Shaq is the man.

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