The headline of the story – "Coffee, Tea May Stall Diabetes" – gets the story off on the wrong track. The active verb "stall" – even with the qualifying "may" still implies a causal link. If you can stall it, you must have proven the link, right? Wrong. Observational studies can only point to an association, not establish causation.
The story allowed the researchers to promote their findings, even allowing them to say "the implications for the millions of individuals who have diabetes mellitus, or who are at future risk of developing it, would be substantial" – without including any independent expert perspective.
For a comparison, readers (and WebMD editors) may want to look at a shorter Reuters story that did a better job on the same study.
Especially when self-intererested researchers make bold projections on observational studies (which have their limitations), independent expert comments are necessary.
Costs weren’t discussed, but most people know what coffee and tea costs.
The story provided several data points about potential benefits, but never discussed the limitations of drawing conclusions from observational studies.
There was no discussion of the potential harms of drinking large quantities of coffee or tea.
While this story included a fair number of data points, it neglected to adequately explain that this was an observational study that can only point to statistical associations – not to established causes.
The story gives no source for the projection that "Researchers say the number of people with type 2 diabetes is expected to increase by 65% by 2025, reaching an estimated 380 million people worldwide."
No independent experts in the field were quoted to provide context for the information presented.
There was not adequate mention of what has been demonstrated to reduce the chance of developing type II diabetes.
The availability of coffee and tea is not in question.
This story stated that, "several studies have suggested that drinking coffee may lower the risk of developing type 2 diabetes and others have shown that decaffeinated coffee and tea may offer similar benefits, but there has not been a recent review of the research on the issue."
The story appears to draw entirely from a journal news release. The concluding quote in the story is exactly the same as the concluding quote from the news release.