Yes mine has the speed control on the back of the barn.  Haven't noticed that it makes any difference to the wait time.  Also I have to have the speed turned up to about 2/3 to 3/4 or the trolley runs so slow it stops. 

I purchased a Village Street Car set to run through my wife's Department 56 Christmas village.  Promo material said the car stops for 5 to 7 seconds at each end to simulate time for passengers to board.  My set is only stopping for 1 or 2 seconds.  It is basically racing back and forth.  It does an entire round trip in about 15 seconds.  Is there any way to increase the idle time at each end of the track?