Once again, I caution as to source. You linked NOT to the article, but to a REPORT ON the article. Thus, you are reading someone's (and who might that be?)interpretation of the article.

That is a red light for me.

Also, you quote:

"the primary cardiovascular outcome occurred in 8.5 percent of the women consuming two or more diet drinks per day compared to 6.9 percent in the five-to-seven drinks per week group; 6.8 percent in the one-to-four drinks per week group; and 7.2 percent in the zero-to-three per month group."

In the 4 groups looked at, the lowest use group has the second highest rate of events. The two middle groups have no difference. That says to me that there is no clear relationship.

Also, this study only talks about "diet drinks". It does not define IN THE REPORT, what a diet drink consists of....and there are multiple diet drinks over a period of time that have been sweetened with different things.