Android WebViews still get to use full-on V8 (where the equivalent Nitro on iOS is limited outside Safari); which likely helps web-based apps on Android.
Despite that, the Android FB app, and most other WebView-based apps on both platforms, tend (IMHO) to be rather dog-slow and buggy anyway. The App Store in iOS6 is one as well, and it shows.
Despite that, the Android FB app, and most other WebView-based apps on both platforms, tend (IMHO) to be rather dog-slow and buggy anyway. The App Store in iOS6 is one as well, and it shows.