It looks like that article you quote is referencing "Metabolic profiling reveals anomalous energy metabolism and oxidative stress pathways in chronic fatigue syndrome patients". However if you look at Tomas' study, they were not able to replicate that study:

"Contrary to previous literature [15, 28] which suggested that abnormalities in PBMC ATP levels may be caused by glycolysis, results from the glycolysis stress test showed that glycolysis in CFS patients does not differ significantly from that of the non-disease cohort. "

So you need to be careful that the studies you're looking at have actually been replicated. In this case it wasn't replicated.