I believe the 473,267 miles are actual flight miles and not MQMs.
In my email, it says I flew 171.161 miles but my flight MQMs were 263,256 (after subtracting AMEX Reserve Card MQMs). Of course the MQMs included class of service bonuses and 500 MQM minimums as well. My spend was about $1050 per segment; $88,894 in total. That's about 30 cents per total MQM or 34 cents per flight MQM.