Why would Google use a font tag?

Question

So, I couldn\'t help noticing while demonstrating Chrome\'s DOM browser thing to my brother, that Google uses a tag.

I know this is

Answer 1

Saving a few bytes on the Google homepage likely saves them terabytes of transfer bandwidth.

Answer 2

In November 2005, Matt Cutts, a Google software engineer, said:

Google’s home page doesn’t validate and that’s mostly by design to save precious bytes. Will the world end because Google doesn’t put quotes around color attributes? No, and it makes the page load faster.

Source: Google Blogoscoped - Matt Cutts, Google’s Gadgets Guy (Interview)

Answer 3

Space saving issues is certainly one reason google might use the font and center tags. Another reason could be for compatibility.

It's in google's best interest to make their homepage to work in all browsers, including pre-IE6 and mobile browsers. Since the font and center tag are so ancient, they're almost universally supported.