Dynamic Equilibrium: Is System Still At Equilibrium During Shift?

[ThomasMagnus]

Hi there, I had a question on dynamic equilibrium (I know this is sort of a chem question so I didn't know where to put it)

I was reading this online

Le Chatelier's principle allows us to predict the effects of changes in temperature, pressure, and concentration on a system at equilibrium. It states that if a system at equilibrium experiences a change, the system will shift its equilibrium to try to compensate for the change.

* changing the concentration (only with gases or aqueous solutions):
If you lower the concentration or remove some of a species, the system will shift to produce more of that species. On the other hand, if you increase the concentration or add some of a species, the system will shift to produce less of that species. For example, in the equation:

My question: During the "shift", is the system still at equilibrium, or is it attempting to work its way back to equilibrium by producing more of the lower quantity species?

Thanks for the help! :)

 

[ThomasMagnus]

The bold part was from here: http://www.shodor.org/unchem/advanced/equ/index.html