Thanks T Beek,
I've heard that very comment before, with the notch down the bees have direct access to the brood chamber, making it much easier for everyone. As for feeding, I use hive top feeders with sit directly on the top brood chamber, inner covers are never used when feeders are on to prevent robbing.
I actually learned from an old Canadian Beek who insisted the notch goes down year round, which provides easier access instead of forcing them to go through the inner cover. With the notch up how do they feed if they must be fed above with a feeder over the hole?
My hives have both top (a notched inner cover) and bottom entrances.
Seems like the notch up position would serve more as a barrier to bees and limit condensation expiration from the hive over winter.