Think of the setting as a means for halting abuse (afterall, do you want someone preforming a ton of searches which will access your db again and again without any wait inbetween?). Just set the setting to something you WANT... as in, if you want there to be a 5 second wait inbetween searches, type in 5. I'd recommend 20-30 at minimum... 20 seconds isn't all that long to wait afterall..
