MLG FLC HAS CONTROVERSY WITH CTLR REGARDING IGNORING THE 250 KTS RESTR UNDER 10000 FT.

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DURING DSCNT INTO RALEIGH/DURAM ARPT WASHINGTON CTL ASKED US AT APPROX 23000 FT TO DSND AT BEST RATE TO 12000 FT. WE COMPLIED WITH THROTTLES CLOSED AND A DSCNT RATE OF APPROX 4000-4500 FPM. PRIOR TO REACHING 12000 FT; WE WERE CLRED TO 9000 FT AND ASKED TO HURRY OUR DSCNT BECAUSE OF TFC 2 MI AWAY; AND TO DISREGARD THE SPD RESTR OF 250 KTS BELOW 10000 FT. I SPOKE TO THE CTLR AND QUESTIONED HIM ABOUT WAVERING OUR SPD LIMIT OF 250 KTS BELOW 10000 FT. WE WERE AT 340 KTS AT THE TIME. HE CAME BACK AND SAID; 'I NEED YOU AT 9000 FT IN 30 SECONDS;' I CONTINUED TO SLOW AT 10000 FT AND ASKED HIM IF HE HAD AN EMER OR IF WE WERE ABOUT TO HIT SOMEONE. HE CALLED BACK AND STARTING YELLING; 'I TOLD YOU BE AT 9000 FT IN 30 SECONDS. I NEED YOU DOWN NOW; TURN L TO 90 DEGS.' AT THAT POINT FROM THE TONE OF HIS VOICE; I THOUGHT WE WERE GOING TO HIT SOMEONE; SO I PULLED SPOILERS AND DSNDED AT A VERY HIGH RATE TO 9000 FT; OVERSHOOTING THE ALT BY APPROX 300 FT. I THINK THE CTLR HANDED THIS VERY POORLY; IF HE HAD A TFC CONFLICT AT 10000 FT; HE COULD HAVE LEVELED US AT 11000 OR 12000 FT OR GIVEN US A TURN. BUT HE CONFUSED US BY GIVING A CLRNC THAT WAS NOT LEGAL AND NOT GIVING US ANY OTHER INFO. IF HE HAD SAID; 'DSND TO 9000 FT IMMEDIATELY TO 9000 FT BECAUSE OF TFC AT;' WE WOULD HAVE COMPLIED WITHOUT QUESTION; REGARDLESS OF AIRSPD. I FEEL PROPER COM WAS THE PROB; AND NOT MAKING US FULLY AWARE OF THE SIT; AND ASKING US TO DO SOMETHING THAT WAS NOT CORRECT.