> I’ve developed apps both native and not native for all platforms, and html5 apps don’t deliver faster results. Developing in javascript is not faster, in fact making a complex app takes about the same time or even more.
This is really a matter of opinion. Obviously if you approach an Objective-C developer and ask them to build you a HTML5 app it will probably take more time, but for someone such as myself who doesn't know and doesn't want to learn Objective-C it will be faster to use HTML5 and Javascript.
> Learning native technologies takes time, but that is a time well invested in something that you will use over and over again to deliver results.
Again, this is really just an opinion rather than fact. If you want to learn and write your app in Java, Objective-C, C# and whatever the Ubuntu phone will use then go ahead. However, I quite happy to write my apps once in HTML5, knowing that there will be some issues, but that I can get it done a lot faster than writing once for each platform.
> HTML5 does not look and behave like native app, never
This really isn't an argument any more. I agree that to make stuff look like native components (and as pointed out by other commenters to behave) is harder in HTML5, however take a look at apps such as Path or Foursquare. They don't look like native apps at all either. Making things look native isn't necessarily something you should be striving for.