Really? I didn't realize most people were that ignorant. I've always typed then hit enter and everyone I know does as well.
Anyway....
Many people also click the "go" button after typing a URL into the address bar of a browser.
I only use that button when I copy/paste a URL using the mouse.
Chrome's address bar provides the insanely awesome right-click -> "Paste and go" option.
I didn't even realize any browsers still had the go button. That's one 'feature' that has never existed in safari. Here's a screenshot of safari 1.2, circa 2003: