2. Example? All the ads I see deal with OS features and differentiating Mac OS from Windows.
3. I bring free speech into it because it's a fundamental issue - in the U.S., we allow companies to "slag" away because we believe even in commercial free speech as long as it isn't misleading to customers. Puffery is not considered misleading if people would understand it to be puffery, and, certainly, honest comparisons between competitors are fine. This stems from the U.S. constitution's guarantee of free speech. Obviously, in England for example, their are many more limitations on free speech (e.g. much stricter liable rules, rules involving discussion of the monarchy, etc.) that we don't have here, and this fundamental difference in expectations is part of the reason people in the U.S. don't necessarily see "arrogance" - difference in political system and life experience does not necessarily make someone a "fanboy," which is what you've accused people who disagree with you as being.
4. That's your opinion. But we're still entitled to post our disagreement with you.