A curiosity about the E line: why are needed 29 minutes from Jamaica Ctr to Queens Plaza, while are needed 38 minutes from Queens Plaza to Jamaica Ctr? And why are needed 30 minutes from Queens Plaza to Chambers Street/WTC, while are needed only 22 minutes from Chambers Street/WTC? The total time is about the same (59/60 minutes) on the whole route, but why there is this great difference in the round trip in the same sections? Does it depends on an uneven of ground?