This subject was covered in detail in the threads/discussion of the AA587 A300-600R crash at New York some years ago.
On this particular model, it was stated the outboard ailerons were eliminated to save structure weight.
It was further stated, that in the opinion of several pilots who had flown the type, that roll control was thus affected to some degree.
And yes, DLC on the L1011 (all models) has nothing to do with ailerons.
glhcarl has given a fine discription of the ACS system on the -500 series TriStar, and yes, it does work to perfection.
Lockheed....far ahead of everyone else.
'Tis a fact