Originally Posted by The Profit
I have been selling artificial turf for 27 years, and there is a difference in speed from one surface to the next.
The artificial turf, inside the OU practice facility, is from a company called SafePlay. At one time, Barry Switzer was a spokesman for the company. All in-filled synthetic turf (2 inch to 2.5 inch fiber with a sand-rubber or rubber only infill) is not the same. The product inside the practice facility does not contain a mixed infill. It is rubber only, which makes it very comfortable, but extremely slow, especially when compared to AstroTurf. AstroTurf is a 1/2 inch fibered product that is normally installed over a .700 inch pvc/nitrile rubber foam pad. There was a time when AstroTurf dominated the US marketplace (50-60 fields installed per year when the entire US marketplace was 70-80 fields per year). Today's US market for synthetic turf is approximately 600 fields per year and 580 of those are the new long fibered in-filled turf. AstroTurf is still sold, but not really for football. It is a popular surface for field hockey, primarily on the east coast.
NFL fields are either FieldTurf (a name brand) or Sportexe. Both of these systems are much faster than the surface inside the OU practice facility, but neither is as fast as AstroTurf.
Starting that all in-filled varieties of synthetic turf is FieldTurf is like stating that all copiers are Xerox, or all facial tissues are Kleenex.
Kelley will undoubtedly run a faster 40 if he indeed runs it on AstroTurf. It would be hard to find a surface that would be much slower to run on (except muddy natural grass) than the indoor turf at OU's practice center.
I hope this helps to clear things up a little.