Yes, it's not a high end CPU like the ones you guys have. I'm not a pro on mining. I have an i3 @2.1GHz (4 threads, 2 cores). I can mine about 0.5 DMD or 0.1 uBTC per day in a fair pool, and those have higher diffs. I was far from thinking I could make one full RHO, but got nothing, not even 0.00000001.
Unfortunately, botnets and GPU farms are going to ruin the whole system soon enough.
Good luck for the dev trying to raise awareness from these guys

Well I'm sure you'd get a full block (250 ROH) when you keep trying. Soloing is hard and takes time, except in the very beginning. Or wait for a pool, but then GPU mining will also work...