Richard D. James was not present to claim the award.
The Grammy's pre-telecast had disco legend Gloria Gaynor presenting the category. Gaynor somewhat comically mispronounced the Warp artist's name, and after some time it became clear he would not be claiming the trophy in person. Grammy voters chose Syro over efforts by deadmau5, Little Dragon, Röyksopp & Robyn and Mat Zo. Aphex Twin recently uploaded over 150 unreleased tracks to his Soundcloud page.
Check out Jordan Rothlein's 5/5 review of Syro here.