I know it's a little late, but I was in MCO 5/2 with an EA reservation. There were approximately 11 cars for Emerald Aisle with a breakdown as follows: 1 Hyundai (Elantra, I believe), 1 Dodge Grand Caravan (Looked to be a brand new model, as it had the updated Dodge script on the back), 1 Ford Fusion and 8 Chevrolet Impalas. I took the Fusion, which was pretty well loaded with leather and working satellite radio.
The Executive Selection had quite a few Tahoes, 300s and the odd Grand Marquis.
I'll be back down there this Friday, so I'll post an update of what I find.