He's also misinterpreted. The incredulity was about 3 things: "achievements, DLC, and even Steam Workshop support." When the focus is on an opinion, rather than facts, the result is often rudeness and inaccuracy. Those two often appear together. When you focus on facts, rather than opinions, it's hard to be rude. An example from http://ycombinator.com/newsguidelines.html

'That is an idiotic thing to say; 1 + 1 is 2, not 3' can be shortened to '1 + 1 is 2, not 3.'