LogFAQs > #971881019

Dont let go early, because that will fail the hold before the directional input, but Im almost positive the game doesnt actually care about whether youre still holding it once you do the directional input, unlike regular hold triggers.

edit, just did some testing and can say 100% that it doesn't care about when you let go as long as it's not before the directional input. Also the next batch of DLC songs (from LIVE-A-LIVE) are out now.