See page 53
There will be severe consequences from rapid fluctuations in priority dates.
If the priority date became current today, due to delayed USCIS processing and thus underutilization of visa numbers, some have predicted that within a few months as many as 500,000 to 750,000 individuals now residing in the United States under a temporary worker visa could apply for a green card. Additionally, DOL’s recent backlog elimination efforts, scheduled to be completed by September 30, 2007, are predicted to add 70,000 or more approved labor certifications yielding as many as 170,000 additional green card applications. As USCIS begins to complete these applications and request visa numbers from DOS, the 140,000 statutorily authorized visa numbers will be used. DOS then will be required to retrogress priority dates. Consequently, most applicants in this scenario will find themselves trapped where as they anticipated timely receipt of a green card, their wait exceeds seven or more years. In addition, all future employment-based green card applicants effectively would be barred from applying for many years
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