No argument with that and it is really not that complicated. Horses run faster on straights than they do on turns.
In a nutshell, when the rail is up/out, the starting gate is moved down the stretch towards the finish and \"more\" of the race is run on turns. Thus the pace is slower and speed types are flattered.
Conversely, come from behind turf horses enjoy the configuration when the race is on the hedge because \"more\" of the race is run on straights and logically the pace is faster.
The worst bet on turf is a deep closer with the rail up/out. Case in point.
Last Sunday (May 10) at Hollywood the late pick four had three likely winners ( $7.00, $4.80, $4.40 ) and a turf race. The one mile turf heat featured a top heavy favorite from the Drysdale barn that had not raced in a year and a fifty-fifty chance to run out. Many services \"gave out\" Box Office Queen as their best bet*. \"Box\" off as the 21-10 second choice, had two solid seconds in this class and came from a powerful barn, but those seconds were on the hedge and as a deep closer she did not fugure to like the configuration with the rail at fifteen feet. The opening half went in :48 and change and she had little chance checking in third. The winner paid some $35 in her turf debut and made the four worthwhile, some $600 for a buck.
Chutes, short fields and courses larger than seven-eights water the tenet down some but the assumption that horses run faster on straights coupled with basic geometry has held for decades and will continue, albeit at shorter prices.
* Many services have to have their selections in early and it is a bit unusual for the rail to be in use on weekends. BBB