Sorry, missed your post due to the section not being too active.
I've only had a little over 1000 miles mostly in Denver. The weather hasn't been too bad either.
Supposedly there is a 10-20% delta with the extreme temperatures - either hot or cold. The handling in slush and some ice has been on-par for front wheel drive. As the tires are still new it is working quite well.
Hills will certainly put the battery to the test. I haven't taken the trip up the highway past Genesee on I70 but I am quite certain it has enough torque to handle it.
PlugShare shows a charge station at the Whole Foods at 261 Lusher Court Frisco but this is not showing on the ChargePoint app. PlugShare also shows a free charger at Vail that isn't in the other app.
It may be a stretch to get there on a single charge although if there are issues with power loss, you can always recharge back down the hill.
Also, I do very much love this car. Very sporty and powerful takeoffs.