When I ping miningpoolhub europe server I get the same ping as if I ping the us-east.lyra2z server. Suprnovas ping is way lower so I'm thinking this could make the difference in earnings. But suprnova is always dead so miningpoolhub is the only option. We would relally need a better pool.
try
http://www.zpool.ca/stratum+tcp://mine.zpool.ca:4553 -u btcAddr
name HashRate
xzc.suprnova.cc 1.43 MH/s
zcoin.miningpoolhub.com 45.64 MH/s
zPool.ca 36.55 MH/s