Yeah, I asked my friend at work tonight and he gave me a look that pretty much reflected what you said in words. He did say he sees dead drones, but his other question was effectively, "even if there were a bunch of dead ones in there, how are you going to get them out?". I suspect he has a protective suit but doesn't want to unnecessarily disturb his bees. He also runs a pretty big organic farm and runs a booth at a farmer's market.
I used to have a contact who was a biology teacher. He had a neat set up in his classroom. Clear plastic tubes let the bees go through the wall to the outdoors. He always had a pile of dead bees for me, but I guess they must have just been accumulation over months, rather than the die-off I had suspected. So, where do all the bees go in the winter (naturally...i.e. wild bees)? I see queen ants and yellowjackets and bumble bee queens in the spring, each year. I figured queens overwintered and honey bee queens would too. So, does that mean that honey bees in human-built hives have a more stable (non-seasonal) life cycle, or is this one of those situations where all the workers are females under the control of the queen and mostly stick around as long as she's around?