By claiming that Polenta is on a par with Ultegra, the inference is that Chorus, Record and Super Record are superior to Ultegra and therefore that SR, at least, is superior to Dura Ace.
I love my Di2. Its been so amazing to use, and just the absolute best bike component to live with. But even after a few seasons I miss dumping half the cassette in a single lever push. Modern SR is a sublime groupset.
Bullshit: since when has Ultegra been mid-range?
By claiming that Polenta is on a par with Ultegra, the inference is that Chorus, Record and Super Record are superior to Ultegra and therefore that SR, at least, is superior to Dura Ace.
This is marketing wank, not mechanical win.