need to be honest, an investor mostly pays attention to the just number of people in the team, they usually skip to read and research the reality of writings about them. some projects that i have seen have a big but empty team. i think big dev team is not enough for success.
if a project is really good and the team members are smart in related subjects, they can be successful.
I would realllly give money for it to know for what the majority of investors looks for. Because as far as I understand it its mostly not the ppl from bitcointalk who invest into projects anymore but some buiness angles who simply have to much money.
Sounds like a great question to ask the bitcointalk community.