Took a break from work this morning to measure how poorly the Lexar UHS-II x1000 card performs on my X-Pro1. Another forum member had stated that the x1000 card is not the best. So after testing it, I found my "slower" UHS-I SanDisk Extreme Pro 95mb/s cards are much faster than this Lexar card on the X-Pro1.
Also, the Lexar card on the X-T1 didn't really impress me, so it's going back to Amazon!
Hope this helps!
https://www.youtube.com/watch?v=_wfzUmWELr4