It's common knowledge in the U.S. search industry that Google has a market share of about 65 percent. Lots of people know (or at least know how to check) the search giant's market cap, too (it's currently at $180 billion). But another measure of Google's size was presented yesterday, and it turns out that Google is on par with all but the biggest ISPs. Craig Labovitz, Chief Scientist of Arbor Networks, stated on his company's blog , "If Google were an ISP,