Well, that flight's a B747. Should be OK. Maybe it was a full load flight too which meant they probably used the weight for balance.

btw, late night departures kept on being marked on time. I think I even saw "boarding" or "gate-closing" statuses on flights like SQ2 and CX880, but as of now they are either marked as delayed to 24/7 afternoon, or cancelled. Does that mean that those flights actually made it onto the apron last night but winds were too strong and the pilots finally decided to head back to the gate?