Which spread?
The spread between the OR of 120 and the TF of 130.
Which spread?
Last year there was a 5.3lb difference between Timeform and World Rankings for horses with TF of 127 or greater.
The difference between RPR and Timeform was 3.3lb
Although these are only averages. Some don’t conform to anything like this and are back to front in some examples – Hawk Wing being a case in point.
Whereas Frankel say shows a 7lb difference from OR (lowest) to TF (highest):
Horse TF, RPR, OR
Frankel 143, 139, 136
Hawk Wing shows just a 3lb difference, with his OR of 137 (WTR adjusted to 133) actually higher than both the RPR and Timeform.
Horse TF, RPR, OR
Hawk Wing 136, 134, 137 (WTR adjusted 133)
So it is not simply the case of using the average to make a standard adjustment.
Of course some agencies over-rate or under-rate horses. What way (other than adjusting for the average difference) do you suggest to see if TF or RPR or OR is wrong?