Earlier quoted context omitted.
I think you mean PayPal pulled a similar guerilla marketing stunt, unless the people wearing the t-shirts were trained monkeys. ;)
If you want to be nitpicky, gorillas aren't monkeys. edit: Really, people? You modded me up to 17 for making a nitpick about simian taxonomy?
Yes. If you look at my recent comment history, you'll see that, by far, the most effective strategy I've found for getting comments with lots of upvotes is to find a factual error in somebody else's comment and correct it in a clear and unambiguous fashion; and within that constraint, the shorter the better. You'll see that I got a comment consisting entirely of "[citation needed]" voted up to 7.
Long comments have essentially no chance of being voted up significantly. Other things that have very little chance: speculations about the implications of something, wild and surprising analogies, speculation on others' motives, advocacy of norms. This is really unfortunate, because those are the comments I most value reading. I really get no value, beyond a little humor, from reading that gorillas aren't monkeys, since I already know that.