As more people start using browsers that support searching from the address bar (e.g., Firefox, Chrome), this should not come as a surprise in my opinion.
True but the same could be said for Facebook and Mobile apps. 95% of the time I consume Facebook content on my iPhone these days (with the other 5% being times I just happen to consume content while I'm specifically going on to create content)
But even if you search from the address bar you land on google, so it's just the homepage hit (that is cached anyway) that does not get counted.