To be honest I was talking just about iPhone development which is the main mobile device to code for atm.

And yes, while you have to have responsive app (iPhone, Ipad, vertical/horizontal), you pretty much have the framework (cocoa) do all the heavy lifting for you, you don't have to worry about you content being viewed in a different device or other OS.

The Android on the other hand I got to agree with you, but Android itself is the Internet Explorer for mobile apps. I'd hate code for an android device as well :P