The writer fails to point out the difference in frame rate.
NFS works fine, is 30 fps. Battlefield feels laggy, is 60 fps.
Do we know at what frame rate the PS4 sends a video signal to the PSVITA? If it's 30 fps, then 60 fps games will feel a lot slower on the PSVITA.
Remote play encodes everything at 720p60 regardless of what framerate it actually runs at.
Famous Mortimer just said in another thread that a 1st and 3rd party pair of devs have said it's flawless on networks not flooded with other devices, similar to what IGN said should be the case.