Yes, but the "Emerald Isle" is Ireland, whereas the "Emerald Aisle" is the National Car Rental express checkout service mark. In the Emerald Isle they drive on the wrong side of the road, but last I was there I saw more Toyotas and Nissans than I had in prior visits. Last time on National's Emerald Aisle (mid-October, we saw one PT Cruiser, no minivans at all, a couple of Chevy Equinox, some G6 and some Chevy Malibus. I'm not sure what convinced us to take a Malibu, but we did.
Of course, our most recent rental was Emerald Reserve as we needed the minivan to schlep family and luggage (including DS's wheelchair) out to Vero Beach. The Grand Caravan was ot nearly as nice as the one's we've gotten in prior years, but then again, it was the Friday of Presidents' Day weekend, National was all out of minivans, and everything else in the Alamo section was smaller (too small to accommodate the wheelchair). Passing by the Emerald Aisle this time, it was pretty empty, with just a couple of G6.