[rtp4me]

Agreed. And, I would like to add, the act of white boarding implies you standing in front of strangers trying to think on your feet. Some people are not as comfortable talking to an audience like that. Maybe a suggestion is for everyone to sit down and draw out the problem/solution on a piece of paper.

Or, how about a reverse white-boarding session? Let the interviewer draw your info on the board while you sit down. Sounds odd, but this allows you to (a) verbalize the problem/solution for someone else to understand and write it down, and (b) gives you the opportunity to see the bigger picture without getting too close to the board (forest, trees, etc).