Depends on the version...Same goes with the rs4 4.2 round about 3x mins per ecu and some older r8s.
RS4 B7 MED9 NEVER flashes in 3 mins per ECU, EVER. unless your time is different than my time. not that I haven't flashed over 300 of either of those ECUs or anything, but hey, you never know. Normal flash time for those flashing 5 blocks into each ECU is around 8 minutes give or take.