In all the examples, even though the visual design is "flat", there are many cases where it's still skeuomorphic...
See the pen and rubbish bin here: http://dribbble.com/shots/947749-Task-app/attachments/107085
The calendar here: http://dribbble.com/shots/917819-iPad-Calendar-Login
And the flat representation of a piece of paper here: http://dribbble.com/shots/962125-Filetypes
They're all flat, yes, but it doesn't mean that they aren't skeuomorphic