It was impressive but I wouldn't get too carried away by that win today. He won easily but so did Delegator at York.
At York Delegator beat Hitchins by 1.5l. Dream Ahead beat him 2l
Delegator beat Genki by 5l. Dream Ahead beat him 3l+
Today Delegator did not get a clear run over 1f out and finished 1l behind Hitchins and a nose in front of Genki. Ignoring Regal Parade, for now, on a line through both Hitchins and Genki, Delegator should have run 2.5l and 5l better than he did today. On the lesser of the 2 that puts him 0.5l ahead of Dream Ahead had he had a clear run.
Of course there is no telling just by how much Dream Ahead could have won but on a strict form line he is no world beater yet; and the time wasn't lightning fast either. However if he is even better on soft then that could augur well for the Abbaye, except that race is over 5f.