DOS predicates slow movement of visa number

in coming months:

D. EMPLOYMENT VISA AVAILABILITY

The level of demand being received from Citizenship and Immigration Services (CIS) Offices indicates that they have a significant amount of cases with priority dates that are earlier than the established cut-offs. This is likely to result in slow forward movement of the cut-off dates for most Employment categories during the next few months. Sudden changes in the CIS demand patterns could result in fluctuations in the monthly cut-off dates, and retrogressions cannot be ruled during FY-2009.

http://travel.state.gov/visa/frvi/bulletin/bulletin_4371.html