Pedigree profiling is too general to apply to the Preakness, specifically. The reason for the discussion before the Derby is that a CD you are asking these colts to do something entirely new, stretch to 10f. Most of the Preakness runners will be exiting the Derby, so they have some sort of indicator of routing ability already.
Profiling for distance capacity is a broad study and not likely to say, colt A is better at 10f, colt B is better at 9 1/2. If a horse can win at 10f in G1 company, he may be expected to also be effective at 9 1/2.
In most cases the "new shooters" in the Preakness have already been 9f, so they are only being asked to move on 1/16, not a huge jump.
Pedigree analysis can lead to to see a certain capacity in a horse, ie. run 10f, handle mud etc. It cannot assure you that the horse is good enough to do it in certain company. Any horse can get 10f if you wait long enough. Cowtown Cat ran 10f last Sat. He just did it in about 2:30. Was it because he wan't bred for it, or just not good enough? For ages everyone talked about dosage and how well it "picked Derby winners." What they never mentioned was the tens of thousands of colts with the right dosage to win the Derby who were toiling in maiden claiming races or unstarted all together. They were bred for 10f but too slow to get there.
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