a bit of a misnomer (at least for the seasoned international flyer).

As mentioned on exiting customs and immigration, the signs direct those with connecting flights to a particular security checkpoint (the transit security referred to) -- it is a mess for the experienced travel because no PreCheck and (not sure) no Premier lines -- meaning everyone is lumped together and us FFers do not get out normal faster lines (a form of hell for the FF ).

But you head to the departure lobby instead you have access to the priority security lines. It is one of those tricks those connecting at IAH from an international arrival learn (or you learn from FTer).