I test drove a Limited and it never came out of Entry/Exit, even at 75+ on the interstate. I haven't seen that with mine, but I also have the Auto Aero mode enabled.
The trucks are shipped in an initial mode (I forget the name - shipping mode?) that the dealer has to reset during the initial PDI. The air suspension trucks stay in entry/exit during this time. I test drove one this way as well, because I wanted to drive that particular truck even though the salesman told me this would be the case.