his work...
So he CAN present iOS 7
Proof : http://www.youtube.com/watch?v=7JLjldgjuKI
Starting 1 minute into the video
The man has a voice and a grasp of the English language so of course he can. The question is will he. There may be a very good reason why there are no additional examples, such as he hated doing it and asked to never be asked again.
Some great minds are not comfortable in front of a large group, Ive might be one of them