Did you select the tutorial theme during the install, or the default black candy theme?
I chose the black candy theme during install. it was a bit misleading for me as newbie with joomla cms background.
My Config File contains now the theme definition for 'black candy', a definition for 'localhost' as development server and a project variable (of which i donÃ‚Â´t know what itÃ‚Â´s task is) set to 'tutorial'
Had same problem here. No _config.php in the tutorial dir. Copied the one from mysite dir and sweet...
System was installed via the install.php method on a Linux system with Apache if you need to track back through install code.
And I chose the Black Candy theme.