"I really don't think that the Igreja Universal de Reino de Deus or Igreja Mundial de Poder do Deus are concentrated mostly in lower income areas of the cities as you stated"
The largest concentration of Evangelicals are in the poor peripheries of São Paulo and Rio de Janeiro(São Miguel Paulista, in SP, and cities like São João do Meriti and Nova Iguaçu) and the Northern region of the State of Rio de Janeiro. None of these regions are known for their concentration of high income people.