Some nice reading, interesting about the labels. Notice they go case-by-case though, they don't say it's not required. Just to note: The word cardiovascular does not appear on those pages. But they do make for some good reading, that last one will take a bit.
http://www.fda.gov/Food/GuidanceComp.../ucm064919.htm
The first url you posted says this is the claim you can make as well.
Approved Claims: Whole Grain Foods and Risk of Heart Disease and Certain Cancers
(Docket No. 1999P-2209)
Required wording of the claim: "Diets rich in whole grain foods and other plant foods and low in total fat, saturated fat, and cholesterol may reduce the risk of heart disease and some cancers."
Above I said, "Let other Court cases guide you, use the rules as a tool." - The claim you can make is above, that's it until you're approved to say something else, like Oatmeal can.
P.S. I don't care what you say on it, truly I don't.. It looks like a kick ass product, no mater what. It's just advice man.