Since you had an update today, I guess I'll retest. (diaggcn?, spelling mistake?). Like before all test are short test at aggression 12, unless stated otherwise.

2.5
phatk_dia, WORKSIZE=128, VECTORS: 282 MHps
diaggcn, WORKSIZE=64, VECTORS: 248 MHps
diaggcn, WORKSIZE=64, VECTORS2: 277 MHps
diaggcn, WORKSIZE=64, VECTORS4: 545 MHps  (Guess the vectors 4 bug has not been fixed? That probably means this is 272MHps)
diaggcn, WORKSIZE=128, VECTORS: 248 MHps
diaggcn, WORKSIZE=128, VECTORS2: 277 MHps
diaggcn, WORKSIZE=128, VECTORS4: 551 MHps (Probably 276MHps)
diaggcn, WORKSIZE=256, VECTORS: 248 MHps
diaggcn, WORKSIZE=256, VECTORS2: 271 MHps
diaggcn, WORKSIZE=256, VECTORS4: 540 MHps (Probably 270MHps)
diaggcn, WORKSIZE=128, VECTORS2, AGGRESSION=10: 276 MHps

might test my card on 2.6 later, but on 2.5, I am getting worse results than before, oh well.