Processing expectations are stated in the official program material, and there is no reliable independent basis for predicting timelines. Treat any guaranteed timeframe from a third party as a commercial claim rather than information, and verify against the official source.
Do not plan irreversible steps around an unverified timeline
Timelines matter because people act on them: they resign positions, enrol children in schools, sign leases and close businesses. For a program whose procedures are relatively new and capable of adjustment, the responsible approach is to avoid irreversible commitments until an actual decision exists. That is the same advice this site gives for every category, and it applies with more force where less procedural history exists. Where a family needs certainty by a specific date, that is a strong reason to have the conventional routes assessed in parallel, since TN, L-1, E-2 and EB-5 have published processing information and long records of practice. Check the official program page for current statements about processing, and note the date on which you checked.
Hypothetical example: a heritage-seed packaging company expects a customer role after an announcement. The review should decide whether to wait for an individual decision or retain another lawful plan, using dated official terms, payment sequence, work authorization facts, and deadlines. Work backward from the controlling evidence, then allow time for correction, adjudication, and any admission or consular step. Keep a written chronology of commitments and permissions. The planning failure is that an announcement is not adjudication and should not trigger irreversible commitments. Do not let a commercial schedule outrun the immigration record.