I still don't follow. The AF can be better than the 7D and also be at least as good (i.e., greater than or equal to). Contrary means "opposite in nature, direction, or meaning." Better and at least as good are not opposite, they can be complementary.
Not that I care if the AF is any better or not, but I don't see how this line in the review goes towards one side or another
Well how about if I simplify it? A person who owns a 70D posted that he thought the AF AI Servo was better than that of the 7D.
The reviewer I quoted said, I do think the 70D's AF system is at least as good as the 7D's AF system.
Now you may think that "at least as good" can mean "better than", but I certainly don't. It is either not as good, as good as, or better than. Why on earth would a reviewer say "as good as" if he meant "better than"
As for the meaning of contrary: synonyms: opposite, opposing, opposed, contradictory, clashing, conflicting,antithetical, incompatible, irreconcilable
Meaning of contradictory: mutually opposed or inconsistent
In other words, someone's remark that the 70D has better AF than the 7D, is inconsistent with someone saying the 70D's AF is at least as good as the 7D's. IMO
As for do I care if the 70D does not AF better than the 7D? Of course I do.
And I am talking about AF in AI Servo mode, not in Video mode.