Actually, I figured it was a design decision, not a bug ... . And the delay isn't that big on my machines.
I agree, though, that the "clunk" (hit) sound is somewhat superflous .. as tanks do not spontanously detonate, you might as figure out that you have been hit if things suddenly go kaboooom ...
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As for AI the most effective work around to this problem so far is to simply use an American instead, they tend to put up a bit more of a fight than your average Artificial Idiot. ... James McGuigan on rec.games.computer.stars somewhen back in 1998 ...
I have noticed the delay when a weapon hits a tank or vehicle. What happens is the round hits, then you get a message about the penetration of the weapon (new with WinSPMBT) and then you hear the impact sound and then if the vehicle is killed you see it explode and hear the detonation. I have not had video delays, but sound delays and problems.