Well I've been overly babying it to this point - and likely will continue to do so for a few more hundred miles. I'll report back at the 1,000 mark.
It's just so bizarre to roll out of the garage in the morning in Drive mode (non-sport), turn right down the hill and have the rig stay in first gear with the RPMs at about 2,500 before it shifts into second. And that's with giving it no gas. If I press on the gas, the RPMs continue to rise briefly and it then shifts into second gear.