What if Operation Citadel wasn't postponed?

Operation Citadel, the Battle of Kursk, was postponed repeatedly, WI it did take place on May 12, before more Soviet preparations took place? Hitler was shown that the Panthers would not be ready and that the Soviets were reinforcing faster than the Germans ever could. If an offensive in the East had to happen in 1943, it would have to be now. I know the Soviets would be less prepared, the troublesome early Panthers would not be involved and it's 2 months before Operation Husky, the Invasion of Sicily, which was Hitler's excuse to cancel Citadel after it started in July. Would the Germans breakthrough and get a small breathing space and time?
 
The German attack is defeated and the Soviets go over to the offensive ahead of schedule.

By the time the muddy season had ended the Germans on the southern face of the salient alone faced not only the defeated Donbas and Kharkov forces, but also the reinforced Central Front, the 1st Tank Army, and 21st, 62nd, and 63rd armies, as well as a strategic reserve of the 24th, 63rd and 66th armies.

German expectations of an early success were predicated on a false assumption of Soviet weakness to match their own, for their forces were far too weakened from the winter battles to succeed offensively against the masses of Soviet forces concentrating opposite then. An early attack could have succeeded had the Germans faced a weak enemy like some of them assumed but it would have had no chance of success against what we now know they actually faced.
 
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