Running at 650 MHz, over the past 23 hours, 46,505 accepted shares, 54 rejected (0.116%) over on Nanopool.

Rejects can have lots of variables, I used to get lots of rejects on my Vegas when I ran XMR-Stak, but after switching to SRBMiner I get almost none.  Same thing goes for pools.  When I mine ETH on my 1070 rig at nicehash I get lots of rejects, none at Nanopool.