Eventually, Google's incredible momentum going forward since their IPO will slow down. That time is not now, however, with their 3Q results showing a massive 46% profit increase along with a 57% increase in sales. That translates to $4.23 billion in "sales", which is nowhere near chump change for a company based on advertising.
The gap between Yahoo and Google continues to grow, though Yahoo is still doing well. Google now employs nearly 16,000 people worldwide, making them one of the largest IT companies in the U.S. That's an awful lot of growth for a company that continues to swallow up other companies left and right to add more services to their ample profile.