In the past Powell showed some footage on this site and a lot of people - skeptics and proponents - said they saw obvious cues. This was another kid though.
That said she did manage to get some funding with help from Chopra & Sheldrake, likely from coming on Skeptiko (b/c I contacted them to let them know), so perhaps the full footage was more convincing?
Personally I don't think Psi will be confirmed by any breakout telepaths - especially since this seems to be very fleeting as the children quickly lose this ability (assuming they ever had it of course).
Rather it will be a slow process involving some of the studies Max_B has brought up, some additional findings in quantum biology, philosophical shifts in academia, and some findings in quantum mechanics generally.