I haven't tried Reality Player yet since it's $9 and the reviews I've seen said it was limited in what it can playback.
I haven't seen a loading issue so far with Moon. I'm streaming from my NAS though. I have the SMB share mounted and then just playing direct. Videos are starting up right away. This is with the TestFlight version of the app which is a free signup. The store version was rotating everything on me so that the videos were in portrait instead of landscape.
It's still pretty rough for playback though. Controls are very limited when it comes to positioning and playback controls. I'd really like to see different playback speeds and better scrubbing control. Trying to pinch on the slider is so inaccurate and jumps around too much. That's been one of my general AVP complaints too. I wish I could use a mouse or something more precise while in the video.
