OTOH, Acats can faster than the manual transfers from brokers not supporting Acats, with the medallion guarantee stamp required on the paperwork and then potentially weeks to finally do the transfer.
FOP ACATS out of IB seemed fast enough for me (3 yearly transfers so far to United Way acct). I think it is instant at the end of the day on the they do the transfer. But they require a paper form scanned in, a scan of DL, and phone confirmation. Then several days for their security department to review. And in their review one year they said the DL was expired because the issue date was in the past, that was fun.
Edit:oops, after reading xerty’s post I think I was wrong on method I used.