The dust problems with the 6D will be the same as the D600.
Really? So, Canon issued a service advisory for dust issues on the 6D just like Nikon's service advisory for the D600 dust issue? That's news to me...
I have to follow the same service advisory with Canon equipment to keep it dust free. So based on my experience, I would say that Nikon is being more customer friendly than Canon.
Oh, really? Does Nikon offer free sensor cleanings for their other cameras? No, just the D600. Why? Because apparently it's not really a 'dust' issue, but an oil splatter issue.
So is it a dust issue or an oil issue? The post is about dust and the link to Nikon provides advice for dealing with dust (which is a problem for all interchangeable lens cameras.) It may be that people who are having problems with oil don't recognise it for being such but it is wrong to think that Canon DSLRs do not have dust problems or to say that they do not.