I had 20 Dash for 31 days of service in July, it will depend on the block size, hash difficulty,voting and number of masternoders, the block size has a cap limit so you will have a minimum of around 0.44 Dash per day with the current number of masternodes ~ 3000
(not everyone has updated yet and enforcement is off so the hot numbers are spurious atm)
These are the predictions,
http://178.254.18.153/~pub/Darkcoin/masternode_payments_stats.html