Nobody Knows about Angela's Power?

By the way, anyone notice how others, even within the company, don't realize Angela has a power. Noah confirmed it as much when he told her, "You know how it works. One of us, one of them". Of course he was referring to her as one of "us" which would be normal. And one of "them" as those with powers. She further supports this by calling Sylar one of "them".

I wonder why Noah would assume she doesn't have any powers? She must be hiding her abilities on purpose. Is the belief that not all the original 12 founders had powers? I have always assumed the opposite, that all of the original 12 founders had powers. But now it appears that not all of the original 12 have powers.

So why do you think Angela Petrelli is hiding her powers, even from those within the company?