As I covered at Search Engine Land yesterday, Matt Cutts, Google's head of search spam, posted a video answer to a question Google's John Mueller asked named Should I add an archive of hundreds of thousands of pages all at once or in stages.
It is an interesting question - sites add on features, sections, new content - but what if you spend months building out a section of your web site and are ready for it to go live. But it has hundreds of thousands of new pages - do you push all that content all at once or do you roll it out slowly.
Matt Cutts said, if you can - push it out slowly. Why? Well, typically it is hard to write hundreds of thousands of pages of quality and unique content over night. So if you do and Google notices, they might send a Googler to go take a manual look and review the site and that content. If you want to be safe and not raise any red flags, push them out in smaller chunks.
Here is the video:
Matt is not saying it is not possible to create unique and valuable content like this. Heck, there are tons of new sites and sections of sites that are under development for months and then launch all at once. It is not uncommon and my thoughts are simple.
If the content is useful, unique and valuable - then pushing the hundreds of thousands of pages all at once won't hurt. Google can handle it, Matt said. The only issue is, if you do not want Google to manually review the content - then you probably have other things to worry about - such as the content itself.
Forum discussion at Google+.