We're currently only on version 1.1.0 of ShowCase and just starting to see some issues like this. What you are seeing is not server load-based delay. The search interface in ShowCase is based on AJAX. This means that we precache a lot of information directly into the user's browser and then, as the user clicks different options, etc. they displayed search results change instantly.
Since we are seeing delay in getting the necessary data into the browser we will be adding some type of mechanism in an upcoming release to notify the user that "loading" is in progress. With this in place it should provide the user with enough information to be aware of what is going on.
Mark
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Mark Ferguson
President - Drive Thru Online, Inc.
Drive Thru Online – Helping Turn Your Passion into Profit
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