The radar tracks are quite informative. I don't know what the procedures are at centennial, but flying downwind at 140 knots 500 feet above the pattern altitude and then descending in lockstep with the metroliner following the profile to 35L makes it look like the Cirrus was being flown like a mini airliner. The recording capability of the avionics will most probably allow a complete reconstruction of what the the Cirrus was doing. But one thing is clear the pilot did not have a good mental map of the traffic situation, which is strange as the Cirrus normally has a pretty good TCAS display. I know Denver is high with the effect on true airspeed, but turning final at 160 knots (if I am interpreting the Blancolirio analysis on YouTube right) looks more than a little sporty.