Could aDataSort refer to column like aTargets does?

Would be great if aDataSort could use the same type of index as aTargets, i.e.

a string - class name will be matched on the TH for the column
0 or a positive integer - column index counting from the left
a negative integer - column index counting from the right

I'm trying to stay away from numerical indexes as possible using class names, and aDataSort is the only piece if my code that has me still using indices.
Using 1.9.2 and TH class name in aDataSort triggers an error.
Thanks
(let me also reiterate how useful datatables has been to me so far)