Usually this is because manufacturers themselves have a schizophrenic attitude: they yell about it when their transistors are nice and small, but then treat the whole topic as irrelevant when their transistors happen to be lumpier than the competition's.
The GTS's star attraction is its torque-rich 4.8-liter V8, the same dry-sump, alloy-block engine as in the all-wheel-drive Panamera 4S but let off the leash a bit, with a higher redline (7, 100-rpm fuel shut-off), lumpier cam-lift logic, more aggressive transmission software (quicker, harder shifts available from the dual-clutch PDK gearbox), and additional cold-air boxes with active shutters behind lower lateral bumper intakes.