I think the wii balance board scales are accurate! I inherited a dr office balance beem type scale from my mother. (She moved into a smaller place) and it reports the same weight as the wiifit.
This morning wiifit said: 192 with 4 pounds of clothes: 196
This morning bb scale said: 196.
So there you go.
in my ticker I go with the adjusted wiifit weight because that is what I started with. So, thinking this through I should really adjust my goal weight down 4 pounds. hmmmmm.