Does this car have electronic throttle ?

I have a 2007 Buick Lacrosse CXS with the 3.6 engine. While on a trip with the cruise on I noticed that the throttle did not respond until the pedal was pushed down more than usual. It does not do this when the cruise is off.
Does this car have an electronic throttle control ?

Welcome to AF. Yes, according to the accelerator pedal sensor used in this car.

In my shop we call this fly by wire.