Found some interesting information:
Officially by the Donezk voting dudes, there were 790.000 legit voters. 75% participation means there were 592.500 people who actually voted. Voting stations were somewhere between 80 and 100. Let's assume 90. That means every station had 6583 voters during those 14 hours time which means 470 voters per hour, 7,83 voters per minute.
In comparison the last German vote from 2009: 43.371.190 votes were cast in 75.081 stations. Every station had to deal with 578 people during 10 hours. Means 58 per hour, round about 1 per minute.
In comparison, the stations for the referendum had to cope with nearly 8 times as much voters.
Go figure.