With newfound knowledge from this thread, I paid a little closer attention today when I left work. 15 degrees outside, started car and let it sit until water reached 50f. Software update was done 2 weeks ago. Pulled out and crept out of the driveway. Gently headed up the road with egt at about 650 to 700. Water hit 85 and egt jumped to 1200. I purposely let off a little (was probably at 20% throttle) and not long after, egt settled back down and stayed under 800. Weather has been very cold here but on my 50 mile journey twice a day I'm struggling to hit 35mpg. Used to be 38 to 41 in the winter but with as cold as it's been, I'm not getting too alarmed yet. Another interesting thing is when I leave for work in the morning, my car is plugged in for 3 hours prior and I can make it nearly all the way to work before it gets to 190 water temp, but when leaving work (no plugging in) it's at 206 within 5 miles. Which reminds me, since new this car ran at 202f unless doing a regen, now it likes to run at 206. (Most of this may mean nothing, just trying to report all I've seen).
