Interesting...care to share your full command line?
 I tried exp too, and can'd do better than around 12.5
on exp or eth (have similar numbers for both), however I can
 reach dcr 360 with almost no drop on eth/exp performance
with -dcri 60 in command line

Edit: my mistake assuming everyone uses ETH for speed testing, but
at least I learned something new...EXP actually seems good option
for people with slow rigs mining to exchange wallets with big cap
on ethereum (0.5 on Poloniex, for example)