Its a very valid theory imo
Every last act this week has won the public vote. Surely that tells us something, does it not? It's about saving the best until last and for it be fresh is viewers minds.
Tomorrow there is some great talent and as it stands there is no clear winner. Earlier this week I thought Faryle but now I'm thinking it's going to be very close between Faryle, George, Kate/Gin and Escala. The competition will be feirce! However whoever goes last will have an advantage imo.
I do think the most fair way would be a random pick but I'm doubtful that would happen.