CNET UK was able to take the iPad 2 running iOS 4.3 out for a test drive and the results are hypercar impressive -- 2097ms. iOS 4.3 and its new Safari Nitro engine gets a lot of the credit -- it blows iPhone 4 and the original iPad past the likes of the Nexus S and Galaxy Tab as well (they've been unable to test a Xoom as of yet), but that Apple A5 is enough to power iPad 2 to very top.
Certainly Android will get an even better version of Chrome in the future, and iOS 5 might just bring us WebKit2 like Mac OS X Lion is currently providing in beta form.
For pure web performance junkies, 2011 is looking to be a very good year.
[CNET, thanks Jason!]