If they run out of time while going through an excessively lengthy petition, they will not take time away from other petitions. Rather, they will just stop and make a decision based on what they have seen up to that point. Second, the letter must clearly explain how the letter writer came to know the factual information stated in the letter. Third, the expert must offer an opinion that is relevant to the matter being considered. Most letters that are offered are deficient in all three of these areas.
Advocacy is the core of any petition.
No matter how well qualified the beneficiary may be, if the case is not persuasively argued, it is not going to be approved. A well argued case explains the attached exhibits and relates the facts to the specific legal requirements articulated in the statute, regulations, legislative history, INS policy memos, and prior cases. In the end, the argument makes it clear that the petitioner has put forward a conclusive case for approval.