I'm getting a bit confused here.
I've read up on AGA vs OCS/ECS differences a number of times and every time so far I found that the Blitter (and Copper) was not actually changed for AGA (as in it wasn't any faster). Now I read this which basically says that the custom chips did get faster.
So, which one is it?
(I do know about the 64 bit fetch modes, but my understanding was this was only for the graphics chip (Lisa) and not for the Blitter).