In some fear of starting this all off again, have waited for the furore to die down before posting this.
The cover picture of the 'Australian Beekeeper', which despite the name was actually the journal of the Victoria state beekeepers association, in one edition several years ago related to this matter. It showed a real old mess and was titled something like.......'OSR.......and built into the roofs AGAIN!' It showed several hives with the roofs off facing the photographer, and all were covered inside with wild comb. Their cover boards had holes.
Yes, when they need to they WILL view the space above a feedhole, even if its only half an inch deep, as part of the hive.
At the heather Andrew Scobbie in Scotland uses this very behaviour as a way to ensure his bees do not get congested, yet his crop does not get spread out over too many boxes and lead to an inefficient extracting season.
He places an extra super above the hole. When they finish the one below they come up and start above the feedhole. Once he sees that started the super gets moved below the board and another fresh one is added above. Works fine for him.
As posted elsewhere we do not use holes in our boards, so there are several ways to do things. Diversity enriches our hobby/craft/profession and is one of the things that makes it so interesting, and makes me feel so priveleged to have the good fortune to be able to make a living at it (2011/12 footnote to self...add word 'attempt' re make living lol). There are very few absolutes in this game, and hive types, holes or not, wood or poly, etc etc are just relative matters, to do with expectations and desired outcomes. Many dearly (and sometimes vociferously) held rules are actually just preferences followed with zeal, and the bees would cope, maybe better maybe worse maybe quite unmoved, if you did it differently for once.
Even a lot of the test books are opinion rich and fact deficient. Its hard to tell the difference at times, as so many different things will work out ok. For that we have to thank the basic resilience of the bees, who generally cope, mostly despite our 'helpful' interventions rather than because of them, and what works well for,one person in one location may actually be a problem in another set of circumstances.
Feed holes? Do as you wish. Its not a major issue.