I'm surprised this works as described (especially with the speed mentioned). If I press CTRL+Alt+T on Ubuntu, I can release it and press T again (by hand!) without it hitting the Terminal window. Reliably, and repeatedly, even with the Terminal app certainly cached, on a modern device with an SSD and low load.

That means an attacker would need to add a wait to risk losing half the payload to the launch animation or whatever causes the delay, and doing it invisibly would be entirely impossible.