The State of Web Development 2010
webdirections.org
webdirections.org
Or maybe it will. Who knows? Point is, unless they share their data collection methodology, this survey could just as likely be representative of the 1,400 folks who follow web directions on twitter.
It's different to Chrome - the Webkit version is different (not sure by how much at the moment) and it doesn't have the V8 Javascript engine (yet - although it is possible to build it with V8 now)