Not sure about that, can't really remember what the game was like for me for the first few months regarding hit reg., don't think I had many problems with it though, certainly not as much as BF 3.
Although the knife was terrible! Could have no problems whatsoever for a good 5 rounds and then there would be times when it would just become the famous "rubber knife"
The sniping was terrible though as mentioned above. And the hit reg was beyond bad for the shotguns and especially the VSS, although I still raped with the VSS

(such an awesome gun when it worked)
On the whole I found the hit reg. to be better than BF 3 though.
Hmm, might actually reinstall BC 2, although there are probably no popular good servers left now
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Last time I played it (about 3-4 months ago) there was only a couple of good HC servers that were mostly full. Shame as I found it to be a hundred times more fun, every thing about it; the weapons, especially the pistols to be better, map design, destruction, not too vehicle orientated, AT4, the classes (recon with c4!) etc. etc.