TDM 3.40 observations

[PeterD]

I'm up to turn 60 in a sol match against 12
opponents all using TDM AI.

Rage, Terran, Tessellate, Jraenar, Narn etc.
I've checked out their progress and while they
seem to be exploring well and have a variety of
treaties and good rescources they all seem to
have stopped building at Light Cruiser size.

Most have researched to battle cruiser or
battleship and a couple have designs for
shipyards on these ships but no attack ships.

Is turn 60 a bit early to have bigger ships?
I'm playing on high diff/med bonus.

I'll continue the game and see what happens.
Any ideas or advice would be appreciated.