Selected answers from the Dumb SEO Questions G+ community.
Arseniy Bolotsko: + It should. As long as the hidden content gets rendered as the page loads then you are fine. However, if you are using some JS script that retrieves content on "call" using ids the you will have big problems.
Dave Elliott: depends how its coded, but, it may well be read properly. We certainly have jquery scripts that do this sort of thing that are read as normal