ALTDEV ALT EXCURSION DURING FLC PLT RESPONSE TO TCASII RA.

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ACR FLT LGT ORD TO ROC AUG/TUE/92. ATC CTLR FROM BUF APCH CTL SEEMED HARRIED; RUSHED AND CONFUSED; RUSHING HIS RADIO TRANSMISSIONS AND NOT RESPONDING IN A TIMELY MANNER TO OUR QUERIES TO VERIFY OUR CLRNC AND ALT ASSIGNMENT -- GENERALLY HE SEEMED OVERWORKED! WE WERE LEVEL AT 11000 FT (LAST ASSIGNED ALT) APPROX 20 NM NNE OF BUF VOR ON THE VICTOR AIRWAY TO ROC; NY. WE WERE IN IFR CONDITIONS (WITH NO VISIBILITY) OUR TCASII GAVE AN 'RA' AND DIRECTED A 'CLB; CLB.' I CLBED TO 11500 FT AND TCASII ADVISED 'CLR OF CONFLICT.' CONCURRENTLY MY FO ADVISED ATC OF OUR CLB DUE TO THE TCASII INSTRUCTION. TCASII INDICATED 'INTRUDER' BELOW AND BEHIND OUR ACFT. THE ATC CTLR SAID THAT THE OTHER ACFT WAS CLRED TO 1000 FT (1000 FT BELOW OUR ALT) BUT WAS CLBING AT A HIGH RATE OF CLB CAUSING OUR TCASII TO 'GO OFF.' HE THEN CLRED US BACK DOWN TO 11000 FT. MY CONCERNS ARE: THAT THE CTLR SHOULD HAVE ADVISED US OF THE SITUATION BEFORE THE OCCURRENCE; I.E.; THAT THE OTHER ACFT WAS CLBING EXCESSIVELY QUICK TO 1000 FT. ALSO; CTLRS SHOULD BE AWARE OF OUR EQUIP ON BOARD SUCH AS BEING TCASII EQUIPPED. THIS IS 'DESIGNATED' WHEN A TCASII ACFT IS FILED ON AN IFR FLT PLAN. IN THIS CASE (AND AS FAR AS I CAN DETERMINE) THERE WAS NO REAL CONFLICT SINCE THE OTHER ACFT LEVELED OFF AT 1000 FT (ACCORDING TO THE CTLR). HOWEVER; DUE TO THE CIRCUMSTANCES (DESCRIBED ABOVE) OUR TCASII SENSED A THREAT AND DIRECTED US TO CLB. THIS COULD HAVE CAUSED ANOTHER CONFLICT IN PERHAPS A DIFFERENT SITUATION. ALL COULD HAVE BEEN AVOIDED IF THE CTLR WAS AWARE THAT WE WERE TCASII EQUIPPED; TOLD THE OTHER ACFT TO REDUCE RATE OF CLB; AND ADVISED US THAT OTHER ACFT WAS CLBING AT AN EXCESSIVE RATE TO 10000 FT.