Just did mine tonight
(at least I unplugged a small oval plug in the top of a silver looking canister in front of the Oil filter --- hope that was it :-)
and went for a pretty hard run around the southern sector of the metroplex trying to see if it would throw a code ---- No codes and no difference in performance that I can tell.... (And even had a mustang playing with me until we happened to be at a red light out in the boonies and I did a brake stand to spin the tires clean....
His chin actually dropped when he saw that

but, anywho... I like the idea of no egr going into my intake....