just wanna know if this applies to jet aircrafts
In the region of normal command (speed above minimum drag speed) the answer is yes.
In the region of reversed command (speed below minimum drag speed) the answer is no.
The region of reversed command is sometimes called "behind the power curve" (but it should be named "behind the thrust required curve").
In this region the slower the aircraft flies, the greater the thrust required to maintain this speed.
Anyway, when you are flying in this speed region with a constant thrust output, a decrease in TAS due to gust will lead to continuous decrease in TAS if thrust is not changed (or the nose lowered). This is a dangerous situation
An increase in TAS due to gust or windshear will lead to a continues increase in TAS untill you reach the TAS that equals the intersection of the thrust required curve with the thrust set on the side of the region of normal command.