Check my logic here, considering the design of the EPAS system, and how it uses a torsion device separating the input shaft from the output shaft, in practice the centering characteristics with the system completely disabled should be identical to the pre-EPAS column. Thus for any difference to be seen between the two on wheel centering, I would think some amount of friction or drag on the input side of the column, which would be identified as some amount of torque on the torsion piece (the output shaft is trying to rotate the input shaft), would inhibit the ability for the input shaft to center or overcome the resistance from the input shaft. I'm just trying to understand how an EPAS system would dampen, reduce, or eliminate centering of the wheel unless some torque difference between the two exists. Now, with that said, if the driver resisted in any way the centering of the wheel (inadvertently or not), then obviously this resistance at the input shaft would be seen in the torsion component, and thus keep the wheel from centering.