I recently put up about 20 pages of new content. Problem was that there wasn't too much content per page (they were defintion pages) and they were top-heavy with code-to-content ration. They just went supplemental.
So, i've fixed the layout (CSS instead of html) so the code-to-content ratio is MUCH better. From what I recall one has to wait a very long time for pages to get out of the supplemental index(3-6 months). Is this true?
Should I simply start fresh with new pages and write off those that have gone supplemental?
The old version of the page can show up as a supplemental result (when you search for words that were in the old content and are not in the new content), and the new version of the page can show as a normal result (when you search for words that are in the new content).
Get a few more incoming links to get the page back into the normal index. Google will still show the old version as a Supplemental Result (when you search for words that were in the old content and are not in the new content) for several years after you make the changes though.