I agree with the 'expertise' allusion.
However times have generally been quick at Ricc, since the renovation in 1998. Good horses can really fly - but even moderate ones go fast as well, it may have something to do with layout, camber, incline, whatever, but the trouble is, it isn't consistent. And horses will cop a couple of runs on unforgiving ground, but most can't manage too many.
Years ago, not long after renewal, I had a very average horse which posted a time of 1.10 for his 1200 mtrs. Fair go, he couldn't have run 1.10 downhill with a tail wind.