Sounds right. I too have noticed the LeafSpy motor temperature follows how hard the motor is working.
Today I set a personal record for high motor temp:
171F after climbing out of the Denver area into the Rocky Mountains on I-70, where it was unusually hot at about 90F air temperature. That is about the worst I can throw at it. Doing 70 mph, up-grade, hot, high altitude. I'd guess the Leaf's warning light limit is around 190F or so.
My mountain-pass ascent isn't as tough as driving up Pikes Peak, or the closer (to Denver) Mt. Evans, both at 14k ft elevation. Here is a Leaf 10 years ago participating in the Pikes Peak Hill Climb time trials annual race event, and I think they may have added some additional cooling (bigger radiator?):
https://www.wired.com/2011/06/nissan-leaf-silently-scales-pikes-peak/
If I tried Pikes Peak or Mt. Evans, I might get it to 180F, guessing. I do think the I-70 long ascent was decently difficult to push it though, where I got 171F motor temp.
My other reading, at a 153F motor temperature, would be the more typical summer hiway driving for me. I don't always go up into the mountains.
Both the 153F & 171F readings are quite a bit higher than yours (knightmb's) so far anyway. Now I suspect my thicker Amsoil SS ATF could have something to do with it, not sure. I'll look to put something thinner in to see if it makes a difference.
Got the Infrared Thermometer today. Wintact WT320 ; amazon has many kinds. Cheap at $15, good for cooking, forehead fevers, transmission fluid changes on my Tiguan, etc.
It should
shoot the side of the Leaf gearbox after a hot run to get some idea if there is some higher temperatures there with the thicker fluid I have now.