Let me wake you up from first world dream...
Using it side by side with 5x which has WiFi ac, I don't find any difference when surfing web, watching YouTube, downloading apps. I even use both to download a big 1gb file and both did almost same time.
As I mentioned before, the network bottleneck is not between your phone and your router. The speed between your router to the destination overseas servers is the bottleneck. Does not mean you have 300mbps speed at home is equal to same to overseas.
Overall, in fact I find the opx more fluid and open apps slightly faster than 5x....wierd but it seems the sd801 has not much throttling compared to sd808/810.
Other than marshmallow which is not obvious when using compared to lollipop, the opx experience to me makes no difference at all compared to 5x.
I will compare the camera and batt life after a few days of usage.
The build quality and size is really a league of it's own. Seldom can find a good phone at good price and good size that runs Android smoothly nowadays.
Sent from OnePlus ONE E1001 using GAGT