Except for the 1Ds3, 7D is currently as old or older than any other body in Canon's entire DSLR lineup since the begining.
the 5DII is the oldest - I believe the 1DS3 is now discontinued
yes 5D2 is oldest but not by much (the difference is less than 15 percent). I'm just pointing out that if you consider the time elapsed between intro and update (regardless of how long the older body keeps selling or when it discontinues), 7D and 5D2 are about the same -- for all practical purposes without splitting hairs. yes, to be precise, give the 5D2 a few more months, but the "time elapsed between 5D2 intro and 5D3 intro" is fixed in history, and the 7D life is approaching that same figure with every passing month, and "in the same league" if you will, as regards the lifecycle.
1DS3 lasted longer than any body, at nearly 5 years. then comes 5D2/7D, and then all the rest have been updated more frequently
The 5DII is still a current model so the 7D isn't catching up.
Not a big issue - just like to get the facts straight