No. Official review, visa availability and actual decisions remain outside a private commitment’s control.
Use the real case stage
A signed benefits letter is not permission to begin work or reside in the United States.
Compare the actual payment deadline with the revised closing and transfer dates, and contact the official process promptly if the requirement cannot be met. The official FAQ currently says the process should take weeks, but it gives no guaranteed completion date, and permanent residence still depends on EB-1 or EB-2 visa availability and standard immigrant processing. Vetting is described publicly in terms of weeks, which is a description rather than a commitment, and later stages depend on visa availability, any interview, and requests for further documents. The steps in the official process are set elsewhere, follow vetting, and are communicated through official instructions; nothing a private seller writes advances or delays them. The actual result depends on required submissions, vetting, eligibility, admissibility, and visa availability, and general processing language on a government page is not an individual guarantee for any specific applicant. Identify what would change in the plan if additional information or a further step is required, and recheck the framework before committing to housing, employment or school decisions tied to an assumed approval date.