In an earlier contribution to this discussion,
At highway speeds it doesn't make any difference - because it won't be using
the lower gears anyway!
W is good for low speed use on surfaces with poor adhesion, because it
greatly reduced the risk of wheel spin. However, it *shouldn't* be used on
good adhesion surfaces because it is gutless and inefficient. Using the
lower gears to generate acceleration torque is far more efficient - and
effective - than generating torque by excessive torque converter slip.
