said 8 months, 2 weeks ago:
I’m not familiar with WP-Touch and what it can and can’t do.
I believe that the List Apart article Responsive Web Design is where it all began.
A responsive website uses a fluid grid and @media queries to create a layout that collapses down in response to the size of the browser window. Elements should use relative sizes like ems and percentages instead of pixels. Fluid images can be obtained using max-width:100%. To read more on that go to: FLUID IMAGES by Unstoppable Robot Ninja.
There are some mobile devices that do not recognize @media queries so this is not a across the board answer, but when is there ever a such a thing;)
If WP-Touch doesn’t serve up a Tablet friendly version then I doubt it’s using @media queries to adapt the layout to the window size.
I’m sure there are other points to be made, but this is the foundation of a responsive design as I understand it.