So just what kind of Safari speed improvements can you expect when iOS 4.3 rolls out? I think the word you're looking for is "moderate." Or maybe "incremental." Still, faster is faster, and this test over Wi-Fi shows that iOS 4.3 is a definite uptick.
Update: Looks like the video's been pulled. We're looking for an alternative, but in case one doesn't exist: iOS 4.3 GM was just a few seconds faster than iOS 4.2 loading the NY Times in Safari. [Thanks, Rich!]