they are not committed but those are the current allocations.
Allocations? By who? An MSM reporter?
When Iowa ‘allocates’ its national convention delegates in mid-June, the nominee will be likely known and those delegates will support the nominee almost 100%.
If the nominee hasn’t been decided, Romney (and to a lesser extent Santorum) will get a disproportionately large share, based on support from party regulars. That’s if both candidates are still being considered.
The proportion of straw votes is not an indicator of the proportion of national convention delegates.