I must have recieved the offer before 12 because I got the email at that time. Although track wasn't working when I checked at 8am this morning so I'm not sure exactly when it came through.
Aww don't give up hope yet igloo, they could still be updating people's track as we speak, it's only 5-ish. (I got one offer at around 7pm)
Even if there's no reply today, they could still be giving out offers until march 31st. If they were going to reject you, then I reckon you would have heard from them much earlier.