If you're going to make an announcement that is going to be held up to the highest rigorous standards, figuring out exactly what to say is going to be a difficult issue. This presentation isn't for you, this is for the physics community.
Right now, he's presenting general stuff that everyone in the room already knows, including him. It's just a summary of the status of the project up to now.
He could have practiced this 6 months ago.
Aaaand... at this very second he's starting on the new stuff, I think.
