The Broadcom wireless card my XPS 13 (9343) Developer Edition shipped with absolutely does not play well with Linux. Including the Ubuntu 14.04 version it shipped with.
It's a known issue, and that's not all. When the machine originally launched there were huge problems with the audio, the trackpad, the bluetooth, and the screen brightness control.
You don't have to buy it. I did... for $1100, and now it mostly sits on a shelf. I had to go back to my MacBook Air to get multi-modal work done. I can use Linux as a primary machine if the only thing I ever use is Emacs. The instant I have to venture across different applications and different modes of content creation (docs, code, slide decks, etc.) it's a very bespoke and inefficient experience.