Most of the information it requests is pretty generic. If you've raised a round and haven't announced it yet, then by all means, don't give it out.
However, for many startups, funding details will be public (and available via crunchbase or startupsearch) -- and generic ownership percentages can be pretty easily inferred. Asking whether investors own <10% or 10-40%, etc, isn't really saying much.
As for the rest of the information (mostly how the team relates to each other, their background, and previous work experience), I can't imagine this would be sensitive either, but if it is, by all means, don't give it out.
