Could be. Not sure how many were still on the balconies at 3 A.M. FWIW, if this guy had done this at Midnight or around Midnight it would have been so much worse with many more dead and injured.
I don't get the timing. Unless he was thinking it would be easy to drive down to St Ann where the other ied's were at 0345. Why would he want to be where the other were left? Wanting to visualize target before remote det?