I came to this conclusion myself as well about a month ago after attending a local Brocade conference where they went over their road map among other things. The marketing folks
at least up till now have been pretty successful at in implanting the impression that the world is moving to CNA. But it seems clear that as your article states we're not going to see true converged networking based on ethernet for a very long time, if ever.
Another topic I had been thinking about which I didn't see raised in your article is the integration of CNA adapters into servers, specifically when we might see market penetration of servers with CNA-ready NICs onboard, to the same degree that we see GigE today. I suspect that too is many many years down the road. Basically I want an ethernet interface that I don't have to worry about what kind of switch it's plugged into. If it's ethernet it should just work.
With an iron curtain between fiber channel and ethernet core switching technologies well intact(Why did Brocade buy Foundry anyways?) it seems the fantasy of CNA will remain