Just an update on my autox experience today. Had a blast! My first lap was 71.891sec, but got it down to 65.015sec. The national champ was impressed with the handling and took it for a drive. He got a 63.155 never having driven it before. The faster cars/drivers were getting 54-59sec laps just as a reference.
The only thing I would change, given that it's an automatic (which isn't so bad once you get used to when to full throttle) is a set of adjustable coilovers with camber plates, hotchkis swaybars (assuming they are stiffer than stock front with Trd rear) a decent set of tires and an LSD.
Even through my battle with under steer, I still managed to get better times than a 2015 mustang, C6 corvette, FRS, 96' celica gt, Hyundai genesis coupe, last gen MR2, RX8 and several Miata's. Obviously driving ability is a factor, but it's not impossible to not have the slowest time of the day. In fact a lot of people were surprised the XB does so well. I was concerned when the safety guy wanted to observe my first lap to determine its stability. Unless you are lowered with a swaybar at least, I wouldn't recommend it.