It depends on the site you're running and your ctr and conversion rate
i would assume. If you get a lot of good targeted traffic that converts
well, adsense will reward you with higher epc. If you're doing black hat
or running miniature sites for the sake of adsense, you'll most likely get
slapped by google smart pricing.

I was using black hat methods to get traffic and pretty much trapping my
visitors. At first it was great and I was getting $.50 to over $1.00 a click.
But over the course of just a week, my epc drastically dropped and I was
getting only 7-20cents a click. it was sickening to get over 700 clicks a day
and barely passing the $100 mark when I was getting that in less than 200
clicks before.

My advice is to test it and track it for yourself over the course of 2-3 weeks.
Some sites like product reviews will do better than others because it targets
visitors who are more incline to click on ads.