NOTE: The machine is apparently FULLY UNLOCKED. No e-amuse however, so this means hidden songs are not playable in standard mode (except for Unreal/NGO which are anytime playable now). BUT, all of the nonstop/challenge courses are unlocked... which means seemingly all of the hidden songs are available in them.
Dann/devilzukin will post vids soon of what we found... massive spoilers otw, you've been warned!!!
I'm not sure if it was the pads or the machine sync, but yeah I was getting a lot of timing weirdness. Was only getting random misses on the 9-10 footers though, so maybe it was me not being used to SN timing.
I'm going back either Friday or Sunday with my camera to get videos. I'll get one of the nonstop list if someone else hasn't already, lots of unmentioned songs on there.
The lack of 2.5x is annoying though, it's an e-amuse unlock. From what I can tell, song/modifier unlocks are e-amuse, and course/noteskin unlocks are machine based (except for Unreal/NGO which also appear to be machine unlocks.)
I was there tonight with my camera, took lots of vids. Uploading now... thanks to Chef & Anthony for helping (and Jeff/Hispanic Guy for playing Poseidon and Pluto.)