I thought it might be interesting to report my experience thus far. I drove 21,000 miles with my P85D and had lifetime 321 Wh/mi. I have now driven 4,000 miles with my P85DL and have this far 323 Wh/mi. Overall my driving habits have not changed but: I most definitely did quite a few launches, just as I did prior to the upgrade. The major difference probably is that I do have much faster acceleration when passing on two-lane roads, and I do quite a lot of two-lane road driving. There also was about half of the driving since the upgrade with much colder temperatures than had been typical during the P85D days; nothing dramatic but temperatures of 45-50 F vs my typical >70 F. Otherwise the conditions have been pretty much apples to apples. Thus my conclusion thus far is that the extra performance is, as I use it, essentially free from an energy perspective. I speculate that the simpler and less resistant single smart fuse of the L is a tiny bit more efficient than are the older multiple fuses, so, assuming one does not regularly use all the extra power it might actually be slightly more efficient. with a 2 Wh/mi difference thus far I am surprised there is really no significant difference between the two. Have other people noticed the difference? Frankly I noticed mostly because my trip meters were reset to zero when they did the battery pack removal during the upgrade, and my Trip A had been my lifetime tracker.