Click here to access article by Seymour M. Hersh from London Review of Books.
I haven't had time to read all of this, but what I have read has a ring of authenticity to it. Besides, Hersh has a long track record of providing in-depth reports about events which have stood the test of time. What really stands out at first glance is that the official story is packed with many deceptions. But, what is confirmed is that the real OBL was caught, probably in a very sickly condition, and murdered by the Seals. The cover story was concocted to serve various political interests such as Obama's re-election and relations with the Pakistani government, particularly with ISI, Pakistan's version of the CIA.
You can read a commentary provided by "lambert" of Corriente blog, and we can expect others to comment on the revelations in the coming days.