Although I am of course a devout speed man, one of the most important aspects for me is to watch the replays of the last couple of furlongs of any horse I am rating or for a bet. Does the figure match the way the horse accelerated, yes sectionals can tell you the figures and they can confirm the speed, but sometimes you can spot a horse doing double handfuls and not quite getting there, or hampered, or wrong trip and win easy next time out at a good price. The figures by themselves can't reflect these instances. So of course although I agree all the tech information and calculations are important , for me , the final piece of the puzzle is always visual.