Interestsing article using nomal people speak. Useful, as I'm toying with getting either a 7D or a 70D as my crop camera for a forthcoming safari and the 7D2 won't be out by then.
For a safari I would pick up a lightly used 7d (they are so cheap now on the forums). There are too many reports of some 70D's having trouble focusing at longer distances which is exactly what you need on Safari. Also the rugged build of the 7d would protect it better versus dust, moisture, drops, getting banged around a jeep off road, etc.