yeah, google update their search engine every moment, they crawl and add new pages and it gets updates every moment
Now keep this in mind, and THINK 100 times before asking this question..
I'm tired of looking of this kind of post....
If you really worry about updates.. Please do this..
SETUP your "Test lab" and create 100 of websites.
Keep focus on "single" factor on "each" website.
One you feel something unusual for your money site, just analyse your "test lab" you can easily find the factor that causing you hard, within few sec.
Again, i'm repeating do this "if you really serious about SEO and google updates."