The only part of Twitter's native apps for iOS that use a UIWebview are when rendering a single tweet since in that specific use case, it's simpler and faster to render links that way rather than deal with rendering it via Core Text. Every other screen in the app is natively drawn. I don't think Twitter's app is a particularly good example.
> "elite-ios-wiling-to-pay" customers are indifference about it
They are? Are you just throwing that out there or is there some research you can back that up with? In my experience, from watching users use hybrid applications (that is, native app shells around web content) they're perplexed about why things look "a little wrong" and the scrolling is "not as fast" as other apps.
On the iPad version of Twitter, even the Tweets appear to be rendered with CoreText. The only place WebKit seems to be used is when you are actually looking at a web page.
> "elite-ios-wiling-to-pay" customers are indifference about it
They are? Are you just throwing that out there or is there some research you can back that up with? In my experience, from watching users use hybrid applications (that is, native app shells around web content) they're perplexed about why things look "a little wrong" and the scrolling is "not as fast" as other apps.
Note: I design/develop Mac & iOS apps.