The multiple desktops is on the bottom and not part of exposé. It includes a new desktop button. It has a dark background rather than blending in with the desktop. It appears you can drag app icons from one desktop to another-- I've never seen that feature before.
The header is black/dark grey, not silver. The colors, gradients and layout of their music player and iTunes look significantly different when compared side by side.
The file manager is greyscale: it doesn't appear to use blue tones like Finder, except for folder icons.
Windows in OS X have 4 buttons, all different colors. Windows in Elementary have 2 buttons, styled the same.
This may seem like a pedantic critique of your comment, but my point is that it's clearly not a "carbon copy" of OS X. The statement "none of the effort was done for design" is not a fair criticism of the Elementary development team.