Howsabout reducing the time gap between searches from 25 seconds which is a long time to wait. It used to be 15 seconds, which also seemed too long.

I understand why there's the need for the time gap, just would like to know whether 10 seconds would do the job just as well and lead to less frustration.

It was indeed set to 25 seconds. We have reduced it to 15 seconds and will monitor the server's performance to see whether we can afford any further reduction. Thanks for the feedback.