Not to me as an interviewer it's not. All I know from that is that you interview well. I come away having no idea what you'd actually produce in a normal working environment. I have no idea about your ability to build anything. All I know is that you can whiteboard well. That's a valuable skill, sure, but it's a long way from the only one, and can be learned pretty quickly with a supportive team.
I rarely need someone that is a master architect. They're going to be in a team of already competent people, and whatever short comings they have, we'll address. But it's my experience that critical thinking and methodical problem solving by breaking the issue at hand down into smaller logical chunks is by far the most difficult to teach. So if you demonstrate that, I'll allocate the resources needed to get you up to speed on other areas.
