So I tried some "tests" with the browser...
I put up Audio Portal player in one tab and a random Youtube video in the other. Compared it with IE using the same tabs and links, and Chrome started lagging to hell until I closed IE and it ran smooth again.
Funny thing is, Audio Player crashed in IE and shut the whole thing down. IE had about 20MB less memory usage though if you combined all the chrome processes.
Someone should try this with FireFox and really see which is the better browser.
We'll see though since this IS just a beta. Still not perfected over years and years of work like those other browsers.