This article came from GK. Number 3 of the 12 is Wireless Networking. It goes on to add that a wireless certification is not enough. We have to be able to understand how wireless plays with the rest of the network.
I think the original article came from Networld.
Don't shoot the messenger. :-)
I read the article, and both agree and disagree with what was said. First, I know MANY people personally that have been hired at $70k+/yr to do wireless-only jobs with little to no background in networking. However, we (CWNP) think that it's very important to have a background in networking (the more the better) before trying to land a big position in wireless. Wireless is an access technology that still relies on knowledge of networking infrastructures as a whole.