Canon is really stupid they should lunch the 7D mk2 before Nikon lunches the D400.
Quite the opposite: It's smart to have the competition show their cards first, then design a Canon version that is produced as cheap as possible, sold as expensive as possible while keeping some marketing joker (like the af sensitivity of the 6d).
Canon market research most probably has shown that old school dslr users are very slow to change brand, and because they're late in the tech race Canon won't be able to stop early adopters anyway ("I want high mp and dr now").
So after a Nikon announcement they have 2-3 month time to cook up something for themselves, which probably will be the 70d = 60d + wifi + gps + touchscreen + afma + fw gimmicks for a start....
The camera is so slow to design that the reaction happens in the next generation, a couple of years down the road. The only reaction after the other camp has shown their cards is to choose your price. Which you can also do if you released your camera a few months earlier.
From their previous record with firmware updates that add functionality or correct severe problems, even thinking that they could add AFMA in less than 3-6 months is optimistic (and again: you can do that with a firmware update).
I see no downside to being first to market: you set a high price and skim the upper part of the market while you're the only guy in town, then you bring the price down if you must when the competition arrives.