Played most of the fifth session before my connection started to crap out (my end, not Nintendo's; the game itself was very stable this time). Maybe it's that I got into a room with all the other obsessives who knew by now to log in five minutes early, but the average skill level has shot through the roof since yesterday.
I'm still playing with motion controls, as I have been all along. While it's anyone's prerogative to abandon them early on for non-motion controls, I think it's important to remember that most motion games, all the way back to Wii Sports, have a certain learning curve where you figure out what exactly is being recognized as your input so you can reproduce it reliably. I get the impression that those of us familiar with the process and the pace of learning, be it through Skyward Sword or Splatoon or the criminally underrated Star Fox Zero, have a lot more patience for getting over the hump because we know well enough to expect a hump, and also know how rewarding it is to surmount it.
I'm consistently having a blast with 1v1 V-Ball now that both I and my opponents understand it. It's all about knowing how the camera tracks the ball, positioning yourself advantageously, keeping an arm ready to capitalize on a timing window or rescue yourself if you miss, and using the jump to fine-tune a good angle to strike.