ACR LGT UNABLE FOLLOW SID ACCOUNT POOR ACFT PEFORMANCE.

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FLT DEPARTING PHX ENRTE TO CHARLOTTE; NC. FLT WAS CLRED TO CHARLOTTE AS FILED VIA THE PAYSO 3 HIGH DEP (CHART 10-3D). AS A RESULT OF EXTREMELY POOR ACFT PERFORMANCE DURING ACCELERATION AND INITIAL CLB; I CHOSE NOT TO EXECUTE THE TURN REQUIRED AT THE 13 DME FIX PER AFOREMENTIONED SID. THE PERFORMANCE EXPERIENCED BY THE ACFT WAS NOT ANTICIPATED THEREFORE ADVISORIES TO ATC. AS TO NONCOMPLIANCE; WAS NOT GIVEN. MY PRIMARY CONCERN DURING THE CRUCIAL PHASE OF INITIAL CLB SEGMENT IS TO CONFIGURE THE ACFT TO ENSURE THE OPTIMUM MARGIN OF SAFETY. IN THIS PARTICULAR CASE; THE OBJECTIVE TO DO SO; WAS COMPLICATED BY THE FOLLOWING. FLT WAS DISPATCHED FROM THE GATE WEIGHING 186700#. THE SURFACE TEMP WAS 92 DEGS F. THE WIND GIVEN ON THE ATIS WAS 210/08. THE ACFT DID NOT ACHIEVE V2 SPD UNTIL APPROX 600' FROM THE DEP END OF RWY 26L. V2 SPD WAS 157 KTS. WE WERE ALSO CLRED FOR TKOF RELATIVELY CLOSE BEHIND AN LGT. AFTER LIFTOFF CLB RATE WAS LESS THAN 500 FPM. ALONG WITH POOR CLB PERFORMANCE; WAKE TURB WAS EXPERIENCED. THE 13 DME FIX FROM SRP IS 6.1 NM FROM THE DEP END OF RWY 26L. THE ACFT HAD ONLY ACHIEVED 800' AGL AT THE 13 DME. ACCELERATION WAS MINIMAL AT THIS POINT. AT APPROX 16 DME ATC ADVISED TO INITIATE A RIGHT TURN TO 060 DEGS. ATC INQUIRED AS TO OUR NONCOMPLIANCE TO THE SID. I ADVISED ATC AS TO OUR SITUATION OF POOR ACFT PERFORMANCE. GIVEN THE AFOREMENTIONED CONDITIONS. I FEEL I EXERCISED SOUND JUDGEMENT. EXCEPT FOR NOT ADVISING ATC OF MY INTENTIONS; IT SHOULD BE NOTED HOWEVER MY PRIORITY WAS ACFT CTL. SUPPLEMENTAL INFO FROM ACN 85567: BY 13 DME FIX; THE CAPT DID NOT WANT TO SACRIFICE PERFORMANCE BY TURNING; SO I INQUIRED IF DEP HAD A VECTOR FOR US OR IF WE SHOULD RESUME THE SID.