AN ACR ABORTS HIS TAKEOFF; ADVISES THE LOCAL CTLR WHO ACKNOWLEDGES; ISSUES CLRNC TO CONTINUE TO THE END OF THE RWY. WITHOUT A BREAK IN THE CLRNC TRANSMISSION; A HEAVY ACR WAS CLRED FOR TAKEOFF ON THE SAME RWY.

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CLRED FOR TAKEOFF FROM T 10 ON RWY 32L AT O'HARE; CHICAGO. HAD TO ABORT TAKEOFF ROLL AT 75 KTS. FO TOLD TWR OF ABORT RIGHT AWAY. TWR TOLD US TO TAXI TO THE END. SECONDS LATER TWR CLEARS A B767 GOING TO BRUSSELS (HEAVY) FOR TAKEOFF ON SAME RWY. WE WERE STILL ON RWY DOWNFIELD. UNSAFE! ORD CTLRS ARE GOOD; BUT CAPACITY PROBS IS PUSHING THEM TO UNSAFE SITUATIONS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: CALLBACK REVEALED THAT THE CTLR DID NOT GIVE AN OPPORTUNITY FOR READBACK OF THE CLRNC TO EXIT AT THE END OF THE RWY. NO BREAK IN THE TRANSMISSION WAS MADE BEFORE ISSUING A TAKEOFF CLRNC TO THE HEAVY ACR THAT WAS NEXT FOR TAKEOFF. HEARING THE ISSUANCE OF THE TAKEOFF CLRNC; THE RPTR USED MAXIMUM BRAKING AND A HIGHER THAN NORMAL TURN OFF TAXI SPEED IN ORDER TO MAKE A RWY EXIT AT A TXWY PRIOR TO THE END OF THE RWY. THERE WAS NO COMMENT FROM THE ACFT THAT HAD BEEN CLRED FOR TAKEOFF. THE REPORTER QUESTIONS THAT CREW'S LEVEL OF SITUATIONAL AWARENESS. WHEN QUESTIONED; THE CTLR SAID THAT THERE WAS ADEQUATE SPACING. HE DID NOT APPEAR; TO THE RPTR; TO BE CONCERNED. THE RPTR ALLEGES THAT THERE SEEMS TO BE A DETERIORATING LEVEL OF PROFESSIONAL ATTITUDE AND COMPLIANCE WITH STANDARD PHRASEOLOGY AND PROCEDURES IN THE EFFORT TO MOVE THE MAXIMUM AMOUNT OF TFC.