The theory of moving the rails out is making the runners run a longer distance is true. This is one reason as to why turf Beyer speed figures are very inaccurate, especially at tracks that do not run a large number of turf races.
In California, we have very few turf races each day, usually 1 or 2, sometimes 3 on weekend cards. One is usually a turf sprint, and the other is a route. The Beyer system is not very effective unless you have a large sample of races to compare. The sample is never high enough in my opinion when the rails are consistently being moved, and you are running one route race and one spring race in a day.
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