i always believe the fastest auto focus and metering is human brain and human eye. it olden days, we memorized all sunny rules 16, exposure matrix and lighthing compensation rules. so it is apply to all SLR and range finder. Even when all electronic devices and metering failed, you can still shoot well if you know how to do manual EV compensation. At worst scenarios, with any aid of old school flash. With the latest advance electronic technolgy, human skill are gradually compromised and often neglected the basic foundenmental of photography - Seeing Lights.
i myself kept a piece of russian FED3 range finder, this piece of metal monster weight almost 600gms++ without any electronic metering inside, it is all manual focusing and and manual shutter release, guess what? it produce one of the sharpest image amongst my camera collection.
"The greatest camera is the human eye behind every single camera lens, hence is the photographer, not the camera itself. The camera is just a piece of tools to achieve and records what we want to show in future"
So i fully agreed with what you have said in this forum. X100 is a range finder type of camera, not even consider a 4third system PnS cam.