We applied in March (our trip is in July as well) and from mail date to return to me, the total time was 7 days. We had 3 US-born applicants and 1 Indian-born US citizen (that application was more involved than just a straight US-born applicant). I overnight mailed in both directions and the Chicago consulate was very fast. Just make sure every last T is crossed on the checklist - a cousin forgot some paperwork and entered some bureaucratic Indian purgatory.