We took our first road trip in our Model X. We traveled to the Springfield Oregon supercharger. Here we charged at a peak rate of 110 kW. From there we traveled to the Grants Pass supercharger. At Grants Pass, the peak charge rate was only 50 kW, less than half the speed of Springfield. On the return trip we had similar results. Has anyone else seen this? Are some supercharger locations faster than others? Anyone have another idea for the cause?