The newest Version of WPTouch also supports an extra iPad View.
I've the mobile iPhone Version of WPTouch cached with enabled Mobile Device Support in WPSUpercache.
I thougt to reject the user Agent iPad to not cache it, but there is a bug in the Plugin, rejected MOBILE user agents were cached with Supercache.
Please fix this bug in the next Version.
A feature request: Make groups with several user agents in it, who has a several cache.