You have no need to repeat yourself again Kunikov. For whatever reason, you do not consider the Third Battle of Kharkov to be anything other than an ordinary military victory. I disagree, as do many others.
The difference I would say between the above mentioned battle and say the 2nd Battle of Kharkov or the First Rzhev-Vyazma Offensive is the relative strengths and abilities of each army between late 1941 and early 1943, in both manpower/equipment, doctrine and tactics. Monty also hit the nail on the head when he mentioned that German forces in the southern sector were in headlong retreat in early 1943 after Stalingrad, whereas in Winter 41/42 they were often dug-in or partially dug-in due to Hitler's standfast orders. It's one thing to attack enemy flanks when your own forces are digging in, quite another to do it when your forces are in general, and often headlong, retreat. Finally, Hitler's standfast order probably did stop the German forces in the Moscow area from routing but I'm sure he issued that directive for political rather than military reasons.
I think the Third Battle of Kharkov stood out because a) it was the last successful German offensive in the East and b) it demonstrated what the Germans probably should have done next instead of trying to revert to WW1 tactics as they did at Kursk.