My experience with a Full-Size SUV wasn't recent, it was in 2000, but we reserved a "Ford Expedition or similar" and got a GMC Yukon XL (they told us they'd be bringing around an Expedition, so we had to wait, then after 10 minutes, they called us back over to the counter, and said we'd have the Yukon XL).
We rented a Full-Size SUV from National last month, and it was a Dodge Durango (the website says it's the Durango, but I called the station a few months before we left, they said it would be a Suburban, but last month they said they have all Durangos).