All the confusion from Americans is totally understandable. That being said, the title addressed his audience...Londoners. Comments suggesting a title change,

All the confusion from Americans is totally understandable. That being said, the title addressed his audience...Londoners. Comments suggesting a title change, so that people he wasn't intending to talk to can understand, is expecting too much. If the topic interests you, take the time to read for more context, maybe even ask, or research it.