I think this is legitimate. This is less fishy and far more believable than the Bin Laden scenario and it was Libyan rebels on their home turf who were responsible, not some clandestine US Special Forces raid in a dark corner of Pakistan.
It is also the exact way in which Gaddafi was expected to go - he was always going to go down fighting and his mentality is that his home town, super loyal stronghold and all-round favourite city would be the place to do it. Despite what the western media had claimed, I never for one moment thought Gaddafi would scuttle off into quiet exile.