Native feel is a false prophet. "Fitness for use" is what you should aim for. The web didn't have a native Windows 95 feel. ExtJS tried hard to achieve interfaces that aped the "native feel" of Windows. Only hardcore interface designers that actually know what "native feel" is care about native feel, and even then they will only care about it so long as the current fashion trend is achieving a native feel. Once non-native feeling apps achieve "fitness for use" en masses, the "native feel is canon" will no longer be part of the app zeitgeist.