Well, ended up with not-so-good luck. The sub called at 11:30 and said he'd be there in 20 minutes. 1:05 he finally shows up and tells us he can't do the install because of the rain. I explained that if he'd been there in the original window there would have been plenty of time to get things done before the storm hit.
I showed him where we wanted things setup and b/c we wanted the dish on our balcony (out of the rain with plenty of cover) he said he'd check the signal. Apparently the signal wasn't strong enough so he felt a roof install would be better. No problem, except he didn't have the right size ladder!
He called for the right size ladder, handed me the phone, someone on the other end said the taller ladder couldn't be used in the current weather conditions. Now he's coming back tomorrow AM (he says) and hopefully we'll get the install done.
Note that the tech never once gave us his name, card, phone number, etc. I DID call Directv to let them know and got the "On-time" credit of $50. They also made sure to add me to the official truck-roll schedule for tomorrow morning, so that's a plus.