Visit http://www.google.com/gmm with a mobile device – the scrolling is super smooth even with floating toolbars. How are they accomplishing this with GWT?
Update
I mean the site as seen by a mobile browser, not the native app. And I always assumed any Google web apps were GWT – I guess I assumed wrong.
I don’t see anything that indicates they’re using GWT. Based on the links at the bottom of the site, they’re either telling people to use an already-installed native Google Maps app (iPhone) or referring them to a site that will download a native maps app for whichever mobile platform they happen to be using.
I’ve developed a couple of Google Maps apps, one using the plain Javascript version of the maps APIv3, and another using GWT. Even a very plain map using the v3 API, which has optimizations for mobile devices, doesn’t have scrolling anywhere near as smoothly as the native Google Maps app on any of the platforms I’ve tried.