i running my masternode since 11 days and till now i get 13 rewards, so actually you can expect every day one reward, sometimes you get 2 rewards in a short time and then it takes maybe 28h for the next. the avg. reward time is 23h, it is only dependent on the number of all masternodes. block time is 1 minute, so there are 1440 rewards every day and we have 1400 masternodes online now.

visit https://masternodes.pro/stats/xsn/statistics to have an overview

if your masternode gives you the status " masternode is successfully started" there is none network config or anything that can influence your masternode negative