I concur with GregM. Immigration at T7 in JFK is a zoo since they introduced fingerprints/pictures and unless you run and push past everyone, you can expect 1/2 delay at least.
I understand the need for the INS to fingerprint, but wouldn't it be nice for J/F/GOLD pax's to have a separate fast track line? I shouldn't have thought that would be too hard for BA to implement seeing as it's their terminal!