Could you please elaborate on "Oh, uh, well, I uh, got some coffee for the dev team."? I'm really curious what are this kind of people saying at an interview.
That is, unless they interview at an organization that is much more interested in finding compatible personality for their culture than they are in the person's ability. These organizations exist; I worked for one a year or two back. The candidate I was interviewing as part of a panel had not been asked a coding question to that point, and she was already quite far along in the interview process -- the next step after the panel interview was an offer. No one else really cared; they just wanted someone who would increase headcount while not disrupting the culture and structure of the organization.
So, the people who answer this way, they're just playing a numbers game. They keep going on interviews until they hit an organization like I describe above; at that point, all they need to be hired is to just be agreeable.
Also, most people have figured out how to trial-and-error tweaking existing code. Blank editor window? Nothing. Modifying a bunch of existing code that renders a web page? Surprisingly able.
Try being part of the interview process sometimes; you'll have lots of fun :)
For this particular job configuring routers was not a primary task, but because I had a passing knowledge of Cisco routers I asked a couple of questions since he had brought it up. After 2-3 questions which the candidate couldn't answer, he finally admitted that his experience in 'configuring' Cisco routers consisted of plugging the network cables into the port at the back.