Sorry, but this is complete rubbish..
Some of the best dacs out there use ESS chips - Ayre, Brinkmann, Lumin, Mytek.
I've owned a "good" R2R dac - a Metrum Pavane - and the Ayre QX5, Mytek Manhattan II and Lumin X1 with their ESS chips walk all over it. And, yes, I've owned all of them.
The idea that R2R dacs have "unmatched bounce" or are more detailed is just ridiculous. The current generation of ESS chips are outstanding which is why they are used in many
very high end dacs
I am really sorry but I would have to say that you might be off on some points. I used to own a metrum onyx and then the Hugo TT2. The TT2 did sound better than the metrum. The metrum is a great dac. I have also hear the mytek and ayre that you were talking about. They are good but they are not some of the beat dacs out there by any means. The MSB line up are R2R based dacs and blow the mytek and ayre out of the water by a good margain.
I recently bought the dCS Bartok and imo it is head and shoulders above the dacs that you mention as well. It is not a traditional r2r but a version of on developed by dCS. They call it the ring dac which is fed by FPGAS.