Unless @q2apro is doings something weird in those admin forms (which I don't think so) the delay is just a browser-based perception. I bet that:
1. If you actually check the server performance it will be exactly the same, which would immediately confirm you're wrong (not necessarily that I'm right :P)
2. Clicking on admin options of any @q2apro plugins, or any plugin, or even a simple page refresh will result in that perception
3. If you open the plugin page, then you wait for 2 minutes, then you go to the plugin options there is no delay
Did I win the bet? :)