Originally Posted by
fanger
For the return, you've always had to recollect bags on your first arrival into US, as I'm sure you recall. So behind security connector is only useful if the TBIT security is faster than T4 or T5, which I've never found to be the case. Also they don't have precheck, AFAIK.
In my experience, the TSA security checkpoint in the TBIT arm of the connector may not have PreCheck, but negligible lines make it considerably speedier than any other of the options relating to T-4 et al. Described further in the Wikipost and some posts.