Additionally, there is something going on beyond a flawed model. From zerohedge.com => http://bit.ly/b5AJsz
"Readers may be surprised to discover that beginning in April, of 2010, continuing through today, there have been 22 out of 23 consecutive upward prior weekly revisions! In other words, the BLS has a definitive mandate to underrepresent the "current" weekly data and to allow it to catch up with reality once it has become "prior", and thus no longer market moving, when in reality should the BLS present true data it would have likely missed estimates on more than half the occasions it has "beaten" and caused ridiculous market spikes like the one experienced earlier. Furthermore, combining all individual weekly data, demonstrates that the BLS has underrepresented initial claims by roughly 80,000 year to date."
Check out the post for a nice chart.