My nearly 3yo DD either has a day nap of 1-2hrs, and then will be awake until at least 9.30pm, and sleep about 9 hours overnight.
Or if i stretch her out without the nap she will be asleep by 7.30, and up at 6.30ish- so 11 hours.

The day naps are killing me though, as some nights its close to 10.30 when she'll get to sleep, yet I let her have a day nap because she's absolutely desperate for one.. And to stretch her to 7pm without a nap can be torture for us both!