This is along the lines of my thinking. I don't think any of those "case studies" prove anything about whether or not the NSA can break RSA. But if they alone

This is along the lines of my thinking. I don't think any of those "case studies" prove anything about whether or not the NSA can break RSA. But if they alone could break ECC and not RSA, they would certainly push for ECC. Because if they were just worried that other groups could break RSA, then presumably they would be happy to provide a demonstration or show evidence for such attacks.