How quickly you can expect to get completed responses to online surveys? This benchmark study of 6 online surveys using Zoomerang shows pretty consistent results 12hrs=50%, 1 day =65%, 2 days =80%, 3 days=90% In one instance going from 65% to 90% took an extra day. And it takes slightly longer to get from 65% to 90% with your own house panel than with a Zoomerang panel.