FLC ATC REVIEW ENSUES AFTER TRACON APCH CTLR QUERIES ACR PIC AS TO WHY THE ACFT MADE A SLOW TURN AFTER GIVEN AN AMENDED CLRNC RTE CHANGE ON FINAL APCH.

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WE WERE ON FINAL APCH TO RWY 26R AND HAD BEEN CLRED FOR AN ILS APCH TO 26R. AT APPROX 3500 FT ON GS ON LOC; THE CTLR ADVISED US TO INITIATE A R TURN TO HDG 360 DEG. SINCE THE AUTOPLT WAS ENGAGED; I HAD TO SELECT HDG SEL ON THE DFGC PANEL AND SET 360 DEG IN THE HDG SEL WINDOW. THE BANK ANGLE SELECTOR WAS SET AT 15 DEG MAX BANK WHICH IS THE NORMAL PROC ON FINAL FOR OUR ACFT AND THE ACFT INITIATED A SLOW TURN TO 360 DEG. WE THEN REQUESTED AN ALT FROM THE CTLR SINCE HE HAD NOT ISSUED ONE TO US INITIALLY AND THEN SET 25 DEG BANK ANGLE IN THE MAX BANK ANGLE SELECTOR. WHILE WE WERE BEING VECTORED BACK INTO THE TFC PATTERN; THE APCH CTLR QUESTIONED US ABOUT THE LENGTH OF TIME IT TOOK US TO MAKE THE TURN TO 360 DEG. WE EXPLAINED TO HIM WHAT WE HAD TO DO IN THE COCKPIT TO INITIATE THE TURN. HE SEEMED UNAWARE AND APPARENTLY THOUGHT WE COULD MAKE AN IMMEDIATE 90 DEG TURN. ALTHOUGH HE SAID THAT OUR ACTIONS DID NOT PRESENT ANY PROBLEM; I THOUGHT THAT HIS EXPECTATIONS WERE A LITTLE UNREALISTIC. IN THE INTEREST OF SAFETY; I FEEL THE CTLRS SHOULD BE MADE MORE AWARE OF WHAT ACTUALLY GOES ON IN THE COCKPITS OF THE NEW ELECTRIC JETS.