I can't explain Tampa's result in Florida, other than supposing that he has a whole lot more stormy weather to the south than he does to the west. My experience when I had mixed-arc was that 110/119 would frequently go out and stay out longer than my D500 on 61.5, which went out later (if at all) and for a shorter duration. And that was using the 61.5 LNB on one of those Y yokes rather than the I joke I put on later.
I see the same thing. I notice that there's a 10 deg difference in elevation between Orlando and Allentown, PA for the 61.5 . Maybe that's the reason we get less outage than them.