153 turns. Turn 130 was the point we were running around blowing each other up. I figured that I couldn't stop his fleets if I waited for them, and couldn't take them on the offensive (too many) so I bypassed them and went for his core worlds.
Except for that sneakyness involving taking out my suply ships, it would have worked too.
Anyone ever read the Bolo short story involving Project Raganok? It went something like that.
Part of the reason for the length was the "underpowered" weapons platforms. There was a decent chunk of turns where we just sat there watching each other, every attack we tried getting blasted out of space by the WPs.
EDIT: 'twas a blast by the way Dex, well played.