Yeah, I guess for a stadium those numbers make sense, but in a lower density office setting I can't imagine using settings like that. Even SmartRoam set to 2 occasionally kicks clients that are doing fine, at 3 it gets to the point where it can be noticeable.
I've also noticed that a good deal of smart phones seem to use either weak or variable transmit power and form this situation where the AP sees the RSSI as 5 or 6 but the client seems to have no issue SpeedFlexing at 100+ down, 50+ up. Those guys would get kicked even at a roam factor of 2, which seems overkill unless it's a high density setting.