I tried it. It turned out to be Hitech himself driving the tank.
I made 3 strafing runs firing the cannon only and I saw many hits. I ended up emptying the entire magazine with no effect.
As I was egressing on the last run, he took off my wing with the cupola gun.
So either something in the internet was VERY screwy (didn't see any lag tho), Hitech was "testing" the new King Tiger perk tank

, or the 37mm didn't work as advertised against tanks.
*shrugs*
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Vermillion
**MOL**, Men of Leisure