Rich,
On many occasions,determining bias is not as simple as looking at the charts.Like anything you study in detail, you find subtleties.There are real sneaky running style/path biases on occasion and on others,it\'s pretty obvious.It\'s like only looking at raw time to determine if a race was fast/slow.
One service I use looks very closely at cushion depth,individual runners,pace duels/pressures and overall race dynamics.They use gate break, position after an 1/8, then a quarter etc.There are several variations of their formula which are used by others.They make one figure for both routes and sprints, I break out NY sprints/routes to separate numbers for myself.
I note you used pace call in one of your posts, they do not think pace call is the most accurate point to use, nor do I.In any event, if you feel that Z was \"beating\" a speed bias in many of her races, you\'ve got a scoop. The bias guys have it the opposite way,probably except Sat.
Re Z,there is no question in my mind that on more than one occasion,she would have been beaten on an \"honest\" synth surface as opposed to those which favored her big late run, fairly consistently.Can\'t imagine they could engineer a better horse than Z on synths. She may be unbeatable on synth since most fast dirt runners trying her out in Cali would probably not be able not transfer their ability.
Lets leave this until Z ships to a few dirt tracks and inhales non Cali female slug-ettes,then we\'ll crown her.I\'m betting she gets waxed against the first fast/salty bunch she meets on dirt.Like to see her meet the good Rachel/Quality Road and others at the Spa.
Mike