I've worked with a 2013 MBP 15" for 4 years and then switched to XPS 13 + Kubuntu. The touchpad is butter smooth - be it taps, clicks, or two finger scrolling (and three finger gestures thanks to comfortable-swipe).
Dell E7440 here with arch linux.
I had never been a touchpad user before, but now it's been 10 months since I used a mouse. I even began to play mouse games with it and it's mostly fine too.
Any XPS 13 (9360) users around who feel the same?