k so i know that this is pretty old but if i were you i would look into using javascript and implement ajax(to be able to load a page behind the scenes) my theory behiond this is you shoul dbe able to open a page in the background then test to see how fast it opened(which your able to do with the readystate of an XMLHttpRequestO bject)

I dunno i havent actually tried and it sjust an idea im tossing out there. because the way it seems...