Oh yeah, I forgot! They do like to overscope across the pond and they do like those thicker tubed, heavier scopes.
Sometimes its hard to break traditions, but based on what you yourself say your needs are, a higher variable such as a 3x9 will work ok. But it will not quite perform as well in the depts of wider FOVs and acquisition speed, either on stationary targets or on moving targets, when speed is necessary for when those quick surprises occur. If one is quick with a 3x9, then all the more faster with a 1x4 or 1.5x5.
With both eyes open aiming and no squinting, the signal to the brain is faster allowing the hunter to react faster and to acquire the target faster to what is seen. A split second can and does make all the difference between getting your shot off vs not getting your shot off. Results would be my first consideration as opposed to klinging onto or upholding more traditional European customs.
As you yourself stated in your last post,,,,,"Many a time I have startled a deer at 30-50 yards and he has bolted and couldn`t get a shot off",,,,,,tells you what? For those situations, you simply get a faster handling, a faster acquiring and a faster aiming scope!
It doesn`t make sense to get a light weight rifle designed for quick handling and then mount a slower handling scope on it, like what many do. You`re only as quick as the equipment that you`re using allows you to be.
As far as the 20mm objective is concerned with regard to woods hunting in lower light but still under direct sun? Well! Although I don`t hunt in the dark, I`ve never had a low light issue in the thicker woods and timbers with my VX3.
With the larger objectives, you`ll gather in a little more light, but not enough imo to make a difference between success vs failure.
You can have the best Euro low light 3x9 30mm tubed scope in the world, but if you can`t react fast enough in order to get your shot off,,,, then so much for a larger objective and slower handling/aiming scope.
Of course, you can always spend some really big bucks for a low variable 30mm tubed Zeiss or Swaro!!