No I don't and I never claimed so. I claimed that the Kubelwagen can mitigate the bleed of a sniper if played correctly. It won't kill it, but if it reduced the effectiveness until the mid game then that is fine as well.
Especially if you consider that it gets buffs specifically for moving damage and sniper killing in the upcoming patch.
The only point I have made is that this claim:
"A kubelwagen gives you opportunity to chase and kill a sniper..."
is at least an exaggeration (if not false), chance of chasing and killing a sniper with a kubel are slim and it would take around 35 sec for a kubel to kill a sniper on the move.
Building a kubel to counter a sniper does not really work since Kubel can be easily be counter by a M3 (or UC).