If you fly Boeing it doesn't matter, since the auto pilot disconnects as soon as you press toga. A go-around is always flown manually unless you are doing a dual channel approach (autoland). With a single channel approach, the auto pilot is not able to perform the go-around. Doing a dual channel approach with a manual landing is a very bad idea, since the autopilot will then trim the stabilizer quite a lot nose up by 370 feet.
Not sure what model of Boeing you're talking about (377??) , but this certainly doesn't apply to any modern one!! They are all perfectly capable of flying automatic go-arounds.