On May 31 - before anyone knew Left 4 Dead 2 was coming - user Walking_Target gave a detailed description of a special infected he and a friend wanted to develop with the L4D SDK.
"After spending an hour chatting about it, we came up with the idea of 'The Spitter' " Walking_Target writes. He then gets down to discussing what this zombie does. Lo and behold, it's the spitting image (groan) of the special infected Valve announced for L4D2 this week.
Here's the best part: Walking_Target is said to be a cofounder of the L4D2 Boycott movement.
Chances are this is just a neat coincidence. For certain Valve has been working on Left 4 Dead 2 well before May 31 and probably had this special infected spec'ed out before then, too.
But if not, it's one hell of a middle finger back to those who raised so much hell about a Left 4 Dead sequel being made so soon.
Valve are a Bunch of Sneaky Thieves! [The Bits, Bytes, Pixels and Sprites]