I had to move the pit that was in water from the cup to a jar. There is a small shoot.
Avocado Pit in Water
The pit grown in soil has a longer shoot and the root found its way out of one of the drainage holes
Avocado Pit in Soil
Apparently, there is no difference whether you grow the avocado pit in water or in soil, just leave the skin on. But I did realize, putting the pit in water, it was much easier to see it's progress and when it needed more water.
Side by Side
Well I'm going to transfer the soil pit to a larger pot but I'm going to keep the water pit in water. I will make my decision when to transfer it to a pot when the jar is full of roots or when the shoot is 1 ft tall, which ever comes first. Like how most Internet instructions say, once it reaches 1 ft I will trim it down to 6 to 8 inches.