A LEAR 35 FO RPTED THAT AN ALTDEV RESULTED DUE TO THE CAPT'S ANGER NOT BEING IFR RELEASED IN A TIMELY FASHION FROM ATL.

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THE LEAR 35; I WAS SIC IN; WAS CLRED TO TAXI OUT TO RWY 27L. UPON REACHING THE TXWY THAT WAS TO TAKE US TO THE END OF THE RWY; WE WERE TOLD TO MONITOR TWR AT THE HOLD SHORT LINE OF THE RWY WE WERE TO DEPART. WE WAITED FOR ABOUT 5 MINS WITHOUT HEARING ANYTHING FROM THE TWR. SOON AFTER WE NOTICED ACR JETS TAXI OUT IN FRONT OF US AT A DIFFERENT PARALLEL TXWY TO DEPART. THE CAPT PROMPTLY RADIOED THE TWR TO SEE WHY WE HADN'T RECEIVED OUR CLRNC YET. THERE WAS NO RESPONSE FROM THE TWR. WE SWITCHED TO THE #2 COM. THE ASSOCIATED ANTENNA IS ON TOP OF THE ACFT. STILL; NO CONTACT WITH THE TWR. THE CAPT WAS IRRITATED AT THIS POINT; AS OTHER ACFT IN FRONT OF US KEPT DEPARTING. OTHER ACFT BEHIND US KEPT TELLING THE TWR WE WERE TRYING TO REACH THEM; BUT THAT DIDN'T SEEM TO HELP. THE CAPT BECAME MORE IRRITATED. FINALLY; WE REACHED THE TWR AND RECEIVED OUR TKOF CLRNC. AFTER PASSING THROUGH 10000 FT AND COMPLETING ALL CHKLISTS WE WERE GIVEN A HEADING VECTOR AND CLB TO 14000 FT. AS WE ASCENDED TOWARDS 14000 FT WE ENCOUNTERED UPDRAFTS AND TURB FROM THE CLOUDS WE WERE CLBING THROUGH. WE AGAIN WERE GIVEN ANOTHER HEADING CHANGE. AS I LOOKED DOWN TO CHANGE THE HEADING BUG; WE WERE REACHING 14000 FT; OUR ASSIGNED ALT. WHEN I LOOKED BACK UP OUR ALT WAS 14400 FT AND THE CAPT WAS FIGHTING TO GET IT BACK TO 14000 FT. THE CAPT OVER-CORRECTED AND THE ALT WENT TO 13700 FT. I THEN REACHED FORWARD AND ASSISTED THE CAPT WITH THE CTLS AND WE LEVELED THE ACFT AT 14000 FT. DURING THE ALT GAIN; ZTL ASKED US WHAT OUR ALT WAS AND TOLD US TO MAINTAIN 14000 FT. WE REPLIED WITH '14000 FT.' I DO BELIEVE THE BIGGEST FACTOR THAT CONTRIBUTED TO THIS INCIDENT WAS THE MISCOM THAT HAPPENED WITH ATLANTA TWR WHILE ON THE GND BEFORE DEP. THIS CLRLY AGGRAVATED THE CAPT.