This MotherJones article is entirely based on an anonymous comment on another blog, which is sort of interesting in and of itself.
[1]: http://energycommerce.house.gov/documents/20100527/BP.Presen...
This seems to be modus operandi for companies these days. Deny everything, then weeks later come up with your own sources suggesting exactly the same thing, when the issue has died down.
What is this link supposed to prove?
It's a diagram of the failure modes of the BOP and some discussion of how it failed. I can't see any indication it shows the well under the BOP is intact or that the movement of high pressure oil-and-sand isn't chewing the assembly to pieces as BP tries to suck some of the oil out of the well.
This isn't a political article.