There are so many potential factors that it is usually hard to narrow it down. What I usually suggest is to make one field a unique entries only, then they can't submit multiple times. Or find a JS call that can disable the submit button after the first press. Either way, it is easier than hunting down the delay.
If you want to hunt down the delay, and are experiencing it yourself, I would suggest looking through our theme and plugin conflict instructions first:
And maybe contacting your host for log details or to see if they can bump up the available memory for PHP.
Posted 9 years ago on Thursday July 19, 2012 | Permalink