[OmikronWarrior]

I'd say, in general, turtling really doesn't exist in Dominions "gameplay" (in quotes for a reaon to be revealed later). Turtling means not playing slow per se, but investing in your defense. And defense comes in three forms: PD, forts, and a few globals. The globals aren't viable to late game, so I'd say they're not a real turtle defense. PD in general is weak and certainly won't stop any reasonably supported army or equiped SC. That leaves forts, but unless you find a choke point they're too expensive to use in that capacity.

That being said, one can still turtle using "diplomacy." Just make a lot of NAPs, buy players off and otherwise keep your nation safe and hope nobody decides to attack.