Potentially better, but not always. It really depends on the demand. When I've rented at LAX, it's been hit or miss. 3 months ago at LAX, I reserved a large SUV (Ford Expedition/GMC Yukon) and although I had a confirmed reservation, the biggest they could give me on arrival was a Ford Escape. Avis pulled through and rented me 2 Escapes at a significant discount from my corporate rate, which actually ended up being less than my original reservation.

Last Sunday I rented a intermediate car from LAX (one-way rental) and I was upgraded to a 2013 Infiniti G37. Believe it or not, I wasn't that impressed with the vehicle, especially with the fuel economy and "comfort" of the suspension on the freeway. I don't think much has changed since I last drove this car in 2007/2008.