There are many, many variables that affect charge rate, battery temp, SOC, L3 charger, etc, etc. Hence charging rates will be all over the map. I had the same with my Kona. The only time you should expect spec results is a warm battery (80F) and a high speed working L3, and no one else charging there (thereby causing it to throttle down). Trust me, I have seen it all... I long gave up trying to figure out each charging rate, and why they are always different. But at best, even after the May update, you will be very lucky to ever see spec charging times. I never did with my Kona. And good luck with complaining to Toyota. I think they made it pretty clear their specs are best case when they say "as good as". One thing I do appreciate is that Toyota was ultra conservative with their charging initially, wanting to protect their batteries, and gave a buffer for the inexperienced that run out of range on a drive. That is unlike some other manufacturers that ended up having their customers' batteries damaged with too fast charging and regen. After some experience I expect them to improve their charging times, but don't don't expect too much. Like I keep saying, at best and per spec, this NOT a good trip car. Use another car for that. For my short trips and around town so far, the Solterra has been great, and even exceeded my expectations in many respects. So I am very happy with my car.