Yeah, the Security Correspondent on the BBC was just asking that as well. He also asked about the role of Pakistan - The Americans wouldn't have been able to conduct such an operation without some sort of Pakistani knowledge/authorisation. I think the answers to these questions would be very interesting and telling about international politics and security (it's my area of law) but I fear that they'll be glossed over because of the 'celebration' aspect of it.
I really don't think it's going to be a massive blow to the group though and it certainly doesn't mean we can even consider changing our tactics or aims in Afghanistan. 5 or 6 years ago, yes but not now.