auh2o
I'd more interested where you rent. I've been upgraded to a caddy only once in the last 2-3 years as Select.
I almost always get upgraded one level (unless I've booked a premium)and often get offered a SUV. I actually have sometimes been "upgraded" when I didn't want it.I've rented convertibles at Midway and they "automatically upgraded" (their words)me to a SUV.