I am currently a lvl 4 Rogue, with an even split in Dex and Cun (17 each) and my Attack is a just a sad 63% and my defense is 28%.
I don't recall my stats giving such low effects in the demo, what is going on?
I do remember a developer post that suggested the numbers changed from the demo.
That being said, it will change very quickly with gear. My Varric has basically a 1:1 balance between Dex and Cunning, and he is perpetually at 100% attack with gear.
While it does get better with gear I found it a good idea to throw a point into Precision early and then spec out of it when it is no longer necessary.