Yes, pse 12 will open the files from a canon 70D
(after the camera raw plugin is updated using Help>Updates in the pse 12 editor)
In the meantime, you can use the free adobe dng converter to convert your 70D files to dng copies, which pse 9 should then open.
windows:
Adobe - Adobe Camera Raw and DNG Converter : For Windows : Adobe DNG Converter 8.5
mac:
Adobe - Adobe Camera Raw and DNG Converter : For Macintosh : Adobe DNG Converter 8.5
How to use the adobe dng converter: