The pickup on the non-status US line is instant after all the silliness about the COC and privacy. So, this appears to be market dependent.
It is a major failing of BA that in this day and age, one is not directed worldwide to the next availability based on status. The specific call center or status ought not to matter as the system ought to recognize status based on the caller's number if it has been stored with BA. The only place that this will not work is in situations where the caller is not English-speaking and thus requires a specific language which may require manual forwarding and only be available at specific times of day.