Another house in my neighborhood was tested and the results came back low; will my results be low, too?

No.

The levels of Radon gas is limited to the ground the home is sitting on and varies from area to area.

As a matter of fact, I remember a story of 2 homes next door to each other being tested for Radon at the same time. One home came back 2.2 pCi/L and the other came back at 22 pCi/L.