Space Fountain
If you factor the gph (guests per hour) rate, and then randomly spread that number over the geography of the park, then no, it's not likely to create a noticeable difference. And with FastPass, a large number of riders do not spend their time in the queue and are actually out in the park anyway. So, you'd have to factor the non-FastPass gph, which - if someone wants to do the math - probably places an extra 5 people ahead of you in the queue at any given ride/show.
There are other variables that will have a much greater affect on queue wait times such as the time of day, day of week, proximity to a holiday, weather, and other attraction closures/technical difficulties, etc...