I can add one from an ATCer.
1) MD-11 descending FL270 (descent rate 4000'/min) with opposite direction B767-300 climbing FL250 (climb rate 2500'/min).
2) both a/c told to reduce vertical speed.
3) see 1)
4) Its what I would have expected looking at the vector/predict level lines available on our radars, had their climb/descents been continued then the MD-11 would have been FL267 and B767 FL264 at point of cross.
5) can't answer that
6) Yes to both, I heard both of the audio's in the background of the transmissions to me very clear and concise. The MD-11 was checking in as the RA activated and give the pilot credit, it didn't interrupt his transmission to me, cut it short maybe, but I went straight back with "and I heard your TCAS alert, report when finished, traffic yadda yadda yadda" to which the B767 came straight in "well that'll be us then, have the ##### in sight and slowing climb" and could hear everything in the background on that one too! Doesn't it give you a heart attack when it suddenly kicks in, sure scared the hell out of me
