The difference between new-media and old media is that the new media is not afraid to link out to their sources. They know their readers are savvy enough to find their way back.
They used an image provided specifically for the media to use? And they didn't even link back to the press release? That's pretty much how the relationship between the press and the PR-departments of companies work. I'd wager that it's a minority that wants access to source and can't google it for themselves.
As an aside, it bothers me that news sites like CNET (and others) don't actually link to a source. In this case, they had no issue using the image from the Cisco site, but couldn't be bothered to link to Cisco's actual news post. I digress, maybe I'm making something out of nothing.