When searching Google for simple words that should return a lot of content the results are limited to around 20 pages. If I click the link to not omit similar results it changes to around 45. The results don't cover every company in a specialist area or every good article on a topic, what's more after you go back a number of pages the results start turning into junk. That seems unnecessarily harsh on any relevant site that isn't a "top site". The x-billion results returned number is still at the top from the days when you could search through a seemingly infinite number of pages.