I landed twice this week at 10:30pm (Monday and Saturday) and while on Monday everything was chaos and it was almost 00:30 when I finally passed aduanas, last night we went through rather quickly and were outside at 11pm!
Both times almost all of the immigration desks were open and got a green light.
Maybe LIM is the totally bipolar airport these days? Maybe I just got lucky and beat the crowds to immigration last night (was seated closer to the front of the plane).
PS. I'm now lowly-Premium, yay!