backed up here to some extent by several of the v strong climbers having bilateral facilitation.
Could be that they train two arm hangs more than one arm.
some musings that might form an answer to bradders...
1.6 - 2.0 fairly standard
<1.6 your two arm scores are low
>2.0 your one arm scores are low
This might point towards where you should train or where you have a injury or underlying issue holding you back.
One might speculate that if you score <1.6 then you will get more benefit from training one arm because you have more unfulfilled potential there. And vise-versa. But I'm not convinced. Anyone want to speculate differently?