I installed them just now and took a spin around the block.

53t Dura Ace 7800 outer
39t FSA triple middle
28t Salsa inner

Shifts are perfect, especially the 39t -> 53t shift.

Actually with the 6700 FD, the inner cage is shaped for a 39t middle. With the 42t middle, I always ran it in a higher position than would be ideal to avoid the inner cage rubbing on the middle ring while the chain was on the big ring. So far the 39->53 shift (with the better positioned FD) seems better than the 42->53 was.