There's something about that report that rings true. I heard on the news that they are delaying putting that new cap on the pipe as there was some kind of leakage elsewhere that would blow if it wasn't sealed. Recent footage of the oil leak shows a much lighter and much faster emission - and I guess that must be because the ratio of oil and methane is changing. Something down there is seriously not right and that's why Obama is getting so het up about it all.
If you think about the leak as a broken water main then the leak starts small but gets bigger and bigger. You can't block the original leak as it just bursts out more and more until it goes like one big geyser. There's something wrong that we don't know about - which is why all efforts to cap it have failed. My guess is that the entire pipe from the oil up to the bottom of the ocean is breaking up. I've heard that the hole is 10km deep!
Even if this thing is finally capped - what of the future? As oil becomes scarcer we have to drill deeper and deeper - but can we risk the same thing happening again?
Think of a child's balloon - it's really tough until a sharp object pierces it - then bang. I think BP have just pierced that balloon.