I said practically none. I've used them before and you can twist the cleat all you want to get it to heel in, but the float is only for heel out.
Isn't that really a relative statement? If you orient that cleat left or right isn't your heel float direction relative to the cleat orientation on the shoe?
The real measurements should be how much angular float is there inboard and outboard when the cleat is in neutral position and what is the range of angles that the cleat can be mounted to the shoe. I.e. left shoe, mount cleat toe in. With shoe parallel to bike, you now have heel in float and reduced heel out float.