Yes and no ! Visual quicker than textual?
In terms of pure speed, the typed command is often more productive than the GUI, especially with keyboard shortcuts, where reduced commands (beginning of the keyword, or abbreviated) are able to accelerate a lot the process instead of moving the mouse and clicking.
The main benefits is to engage the no necessary our memory and initial learning: The visual show the different commands that are possible, as we were doing by typing ‘help command’. And in the same time, we train and use the ‘visual’ and ‘kinesthetic’ memories, in addition the ‘verbal’.