That was some impressive writing Norman. I haven't seen anything like it (well, besides the articles the editors here write) in a while.
To be honest, I kind of agree about your statement of how Valve's friendliness turned on them. None of this would have happened if Valve never made a promise. None of this would have happen if they acted like the many other companies out there, who charged for downloadable content/patches rather than continually giving it out for free.
As your statement says, they never gave us a date or anything. How can we be sure boycotting was a success? Maybe this was planned all along. We don't have any evidence really, except a feeling of "They must have felt pressured and made it just before L4D2!".
I've been saying that we were just spoiled. Seriously, our standards have raised from being treated so "nicely" with all this free stuff, and next thing you know a boycott is on its way. I do find it somewhat ironic that Valve actually managed to turn things around in a marketing move, with the whole flying the leaders to try out the game, and then the fan reaction allowing Newell and friend to fly to Australia.
Really, I don't see much of a success, other than a "feeling" that they were pressured to release DLC for Left 4 Dead.