So,
Ars is reporting that remote play works pretty well as long as both ends are wired. Is your switch gigabit?
Yep. All of my hardware is Gig-E based. Although, I read their article, and they didn't seem all that enthused with the streaming. They definitely found it terrible over Wi-Fi, but acceptable under Ethernet.
However, it is important to keep in mind the test being done. Ultimately, we're both performing subjective tests (i.e. how it seems to us vs. using equipment to test the latency), but we're using different games. I use Resogun as it's probably the game that I own that requires the highest reaction speed.
After I was done testing with the PSTV on the same switch as the PS4, I just switched my receiver over to the PS4 and played the game natively. Honestly, it was
night and day difference. I went from being completely incapable of making quick maneuvers to doing my usual, crazy antics like zipping through the smallest path between enemies that I could possibly find and doing quick turns that allowed me to narrowly escape impending doom.