I typically spend more time GVing each camp than any other category and have since AW. I haven't had a chance to try the Sherman yet but the Panzer, Tiger and T-34/85 seem normal as do the Wirble and Osti.
One thing I did notice today though was sometimes I didn't see a puff of dust or a splash (against LVT's) when firing and, with no reference, that makes it harder to range.
Guess I'll have to try the Shermie but I typically don't like it's slower rate of fire.