MINOR GND COLLISION BTWN 2 ACR ACFT AT DTW.

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NORMAL GND CONGESTION AT DTW FOLLOWING VMC LNDG AT DTW. SLOW TAXI-IN WITH FREQUENT STOPS IN SEQUENCE BEHIND B- 727. AS HE MOVED FROM OBSTRUCTING OUR TAXI PATH FROM OUTER TXWY TO OSCAR 10 INTXN; WE TURNED AND WENT IN TO ALLEYWAY BTWN THE CONCOURSES. AFTER PARKED AT GATE AND PAX DEPLANED; FO CAME BACK TO COCKPIT AND NOTIFIED ME TO LOOK AT L WINGTIP. OUR L WING VORTILLON UNDER WING PORTION WAS BENT APPROX HALFWAY DOWN. I NOTIFIED OUR MAINT AND ESCORTED HIM TO RAMP TO SHOW HIM ABOVE DAMAGE. SUBSEQUENT RPTS FILED. THE B-727 THAT WAS AHEAD OF US RECEIVED 5 INCH CRIMP IN #2 ENG EXHAUST FAIRING. WE DID NOT REALIZE THIS UNTIL 10-15 MINS AFTER PARKING AND WERE DONE WITH POSTFLT. SUPPLEMENTAL INFO FROM ACN 264702: I ASKED THE CAPT IF THERE WAS ENOUGH ROOM AND THAT IT LOOKED VERY TIGHT. THE 727 WAS SLOWLY MOVING FORWARD. I LOST VIEW OF IT AS WE TURNED. HE LOOKED OVER HIS SHOULDER AND KEPT MOVING. THE TXWY WAS ROUGH WITH PATCHY SNOW AND WE FELT THE JET BLAST ON OUR ACFT FROM THE 727. THERE WAS A THUMP OR BUMP AND I WASN'T SURE WHAT IT WAS. I CHKED THE WING UPON GATE ARR. THE WINGLET WAS BENT ON THE LOWER HALF. EVEN AFTER ASKING TWICE IT SEEMS YOU CAN NEVER NEVER TRUST ANYONE. GIVING CAPTS RESPECT AND TRUST WAS WHAT I GAVE MINE. HE TAXIED INTO ANOTHER ACFT AFTER I QUERIED HIM.