The Thropattern stats for first turf are listed as roughly 18/19/24/39. Do you have any data handy on what it would be for 3YO's vs 4YO's vs 5+? I have to believe a horses chances of running well on turf are inversely correlated to age. If he hasn't tried it by age 5 it's probably because his trainer(s) think he wouldn't run well over it.
It would be nice to know the breakout though.
Thanks.