Heard them on 129.42 (SAM SIDS I believe), so they were certainly beyond the TMA (and probably over water) whilst dumping. Didn't catch their level, but were initially cleared FL130 direct OCK from their hold, so would have been at least at medium level whilst dumping.
Speed was <250Kts IAS for the whole descent, as apparently the "noise" came back if they went faster.
It was pretty windy, W'ly @ 50kts as they were joining the ILS 27R @ 3000'.