Symbian is not the GUI!
"There's still that annoying thing with Symbian where lists require a double press, while icons need only a single press"
How many times El Reg, do you have to be told that Symbian is the OS layer. The GUI is Nokia's (pretty ancient and crappy) S60.
Hopefully the upcoming QT interface will address S60's shortcomings. Gawd knows why it is taking them so long. It's their only hope they have of finally competing with the iPhone and Android.