Treat it as a claim to be evidenced, not a feature. Adjudication timing is set by the government, not by a sponsor, and no promoter can commit to a decision date. Past experience with a project can be informative if it is documented, but it does not bind any future outcome for a different applicant.
Compare what a sponsor actually controls
A sponsor can control how quickly it supplies documents, how complete its business plan is, and how it responds when a government request arrives — all of which genuinely affect a case. It cannot control visa availability, which depends on the applicant's category and chargeability, usually determined by country of birth. Ask about the controllable items, and treat any promised approval date as a reason to look more closely, not less.
There is a further reason to distrust a speed claim: it usually describes the sponsor's past experience with other applicants whose personal circumstances differed. Two investors in the same project can face very different timelines because of chargeability, admissibility or the state of their own source-of-funds evidence, none of which the sponsor controls or knows. Ask instead how quickly the sponsor has historically responded to government requests for evidence and whether it will commit to a response time, since that is a real, controllable factor and one that materially affects a case.