The posting was linked by a tweet by Robert Khoo (https://twitter.com/rkhoo/status/405150202736418816 https://twitter.com/rkhoo/status/405150202736418816) which

The posting was linked by a tweet by Robert Khoo (https://twitter.com/rkhoo/status/405150202736418816 https://twitter.com/rkhoo/status/405150202736418816) which was retweeted by several Penny Arcade staff. Mike Krahulik participated in a few Twitter-based discussions. One indicates that this is a replacement posting (https://twitter.com/cwgabriel/status/405526125171843072 https://twitter.com/cwgabriel/status/405526125171843072). That doesn't mean it's not real, it's certainly not above anyone at Penny Arcade to poke the hornet's nest, but there's enough indications that I think it's safe to say it's legit.