Amen to that. Also, a crew response is required in 5 seconds of getting a RA. Assuming that you would need a few seconds to look out, sight the traffic, ascertain its relative direction with respect to yours and look back to your instruments to analyze the instructions and execute the maneuver, you would have lost precious seconds and exacerbated the situation to fatal proportions. So yes, crew that are operating in RVSM airspace are trained to positively follow their TCAS, and disregard potentially conflicting instructions from ATC in case of an RA.