He mentioned just for code browsing so don't panic. Nobody in their right mind would think XCode compares to Visual Studio. I mean it's 2012 and there is still no refactoring support.
I took a look at Whole Tomato: http://www.wholetomato.com/products/featureRefactoring.asp
A couple of those features Xcode implements using code completion. It looks like Whole Tomato may be slightly better, but your comment is clearly wrong.