The REAL venting problem..
It is NOT the problem that air can not flow out through a 1/4" hole as fast as fuel can flow in through a 1" hole. It surely can -- IF there is air on both sides of the hole so the air can flow easily, and lower air pressure on the outboard side of each rib.
The actual problem with the venting is that fuel is trying to flow in through the same 1/4" hole! Now, the escaping air has to bubble its way through the fuel "blocking" the hole. Draw a sketch of the tank and ribs, at a dihedral angle, and you will see this. Each bay has an air bubble in its outboard corner, against the rib outboard of it, but the same rib is flooded in the next bay out. Same situation for each bay. The flooded bay is essentially raising the pressure at the hole (because of the 'head' of fuel above the hole), so it takes some slightly higher pressure in the air bubble to force its way through to escape.
Ever try to fill a small-neck bottle quickly under a faucet? At a certain flow rate, the flow will spray all over the place instead of going into the bottle, because of the airflow trying to get out of the bottle. The internal air builds up pressure until it burps out through the hole. Ever wonder how high-speed bottling machines deal with this? They put a straw in the hole, giving the air a path to escape while fluid goes in the rest of the hole. Its a really small straw, because without the back pressure, the air can flow really fast through a small hole.
A gallon of air can flow through a 1/4" hole WAY FASTER than a gallon of fuel can flow in through a a couple of 1" holes, as long as there is not a higher pressure on the other side of the hole.
So, larger vent holes help because they allow more space for fuel to flow in and still have some room for air to flow out, through the same hole, without building up any pressure "head". Another way to do it would be to put a tube through each vent hole, ending right close to the rib on the inboard side, and extending across to the outboard side of the next bay. This would surely be overkill, fixing a problem with a more complicated solution than is needed. But it would work really well.
My solution? I do my waste-water dump first, so I don't get impatient with the sound of running fuel into the tanks and start knocking my knees together.
Without that added stress, I am happy to wait the extra 30 seconds it takes for the air to gurgle out.