vanessafox - 5:33 am on Mar 6, 2011 (gmt 0)
dickbaker -- Filter the data to the US only, Web only, and change the date range to begin at 2/25 if you want to see US-based current rankings data.
(I'll edit the article to mention that.)
Note also that results have gotten fairly personalized so the average ranking position webmaster tools shows you is the average across what every searcher has seen. I'm fairly certain it's accurate.