This list is reduced by symmetry which means that each cube shown represents all 48 configs that can be made by rotating or reflecting, this significantly changes the proportion of each type:
Type | Reduced | Unreduced |
WW | 36% | 50% |
Parallel | 25% | 33% |
Neither | 39% | 17% |
The skew from symmetry reduction makes it appear that more configs can be solved without needing to use a sequence so keep in mind that the Unreduced column is the actual distribution.