You have people on this board with hands-on, daily experience saying otherwise. That's leads to a small set of interpretations and assumptions:now in a typical household room its going to be worse than this.
1) They're all lying and Kinect doesn't work very well but they don't want to admit to that and are arguing for the sake of arguing.
2) It works just as well as they are saying and your assumptions about Kinect's failure to provide robust voice control, which you yourself haven't used, are completely wrong.
Which are you going with?