How about:
- without LCD
- with standard 4x20 LCD
a pic is ready as soon as its osc is stable; as discoverable from the oscstat reg, a handful of microseconds at worst
a LCD can take 100's of milliseconds, 500 not uncommon. its not the same across version/model/maker either
its usually pretty obvious when you have tried to talk to a LCD before its listening

i feel you have the cart before the horse