Ainsley's ability as a shaman did startle everyone, enough to make some with weak hearts get shocked to death. However, in the eyes of the five buds, being a 3-years-old shaman wasn't that shocking.
Some powerful families expertise in shaman ability also had their young kids awaken the shaman power before 10. Even though it's unheard of whether one could get the power when they're still 3, the five buds didn't mind it.
Their focus was actually on which spirit Ainsley made a pact with. It's a common knowledge that the strength of a shaman relied on the dead spirit that they managed to contract.
One could only contract a few dead spirits in their entire life, maybe only one or two dead spirits even for the strong shamans. Thus, their strength depended on the first spirit they contracted or the second spirit.