When I first logged on after the servers came back up, I think I might've agreed with you. My first 15 harvesting attempts resulted in 11 times where I gathered no resource at all. Since harvesting skill levels- supposedly- have no bearing on whether your attempt is successful or not, I thought something had been done to recode the success chances in the rollback.
However, the next 15 or so attempts resulted in a roughly 70% success rate which is, for me, pretty typical. So I;m guessing that you, like I, ran into a run of bad luck and nothing more.