That is really all startups need.

Startups will either have a product that is so awesome that they get popular on their own merit and can fix the logo later (Facebook), Or their technology is desired by someone else and they get bought up by someone who doesn't care about the logo cause it'll just go away (Many startups), Or they'll be a semi-successful company that fades into the obscurity of the semi-successful startup army in which case a solid but not stand-out logo is just fine.