That could be. I think the truth is medical authorities in the US don't really know all there is to know about ebola virus transmission because there have been so few domestic cases. And I don't know how thoroughly it might have been studied in West Africa.
It's just struck me as odd since ebola became a story in the US that sweat, certainly the most 'on the surface' bodily fluid, has received so little attention when transmission is discussed. But maybe it is a carrier of the virus only in latter stages of the disease.
Sweat does not seem like a very viable vector http://jid.oxfordjournals.org/content/196/Supplement_2/S142.full although he sample size in this study was just 1 (one). The basic idea is the virus has to make it through the sweat gland from the blood to the sweat. A bleeding patient who is also sweaty would be deadly.