a couple of weeks ago at IAH a young guy (The ones that help with queing etc before you reach the immigration official) sent my wife and me (she is a citizen , I merely visit with a visa) from the citizens line to the regular one

I asked him if it was a new regulation and he looked at me dumbfounded while saying "No", he even suggested that we could go in different lines, she in the citizens and I on the visitors one

I am 99% certain that he was wrong on both counts (going on the other line and being able to go on separate lines), I would love to see the expression of the immigration official if he asks "are you married? where is your wife?" and then I answer "oh she must be waiting for me in customs....she just went through the citizens line"

This was the first time in literally 50 or more trips that this has ever been an issue

I tried to find a link from CBP or something to print and carry with me but couldn't find any