Is there any reason why Shimano's SM-AD67-L (34.9mm) clamp band adapter would not be compatible with a Shimano's Ultegra FD-6700 direct mount front derailleur?

The SM-AD67 is promoted to be used with Shimano's Ultegra FD-6800 direct mount front derailleurs. From what I've read, this clamp band adapter accommodates the support bolt and plate of the newer derailleurs. Does anyone have knowledge or experience of this adapter's backward compatibility with an older direct mount derailleur - particularly an FD-6700?