Hi mate. Sorry for the late reply, I didn't check back to this thread till now. Here is the youtube link (maybe the guy got a defective one?)- http://www.youtube.com/watch?v=3bL5eBIirQw
Well, it is possible that he got a defective pair somehow - but Pioneer's quality standards are generally pretty good so I doubt it.
I would like to just quickly note three things though:
1. Outside of that video, I've never heard anyone complain of leakage on these.
2. I myself have never had anyone complain to me about leakage while wearing these.
3. I would speculate that 100% volume would produce leakage in most (if not all) cans.
Since the bro likes Beats so much, he might want to know that they also leak pretty badly... and that problem is still present in their newer models. For example, check this out: http://www.youtube.com/watch?v=17nAeqA2Ag4 And they're sitting a lot farther from the camera/mic too than he is.
Ooh boy, that's a much larger discussion. But here's the short of it. Getting two drivers to work together coherently and clearly is a devilishly tricky thing to do. So unless a manufacturer wants to put in the costly engineering time to get it right, it's gonna sound not so great as one would imagine. With these, I feel that Pioneer definitely did a good job - which makes them all the more special in my book.