I would disagree with that, target. If you happen to play the hours I do (come to think of it, I've seen you on a few times, no idea at what hour though). Anyway, at the times I'm on, I see the hordes as being the squads having 15 guys on in an arena with only 80 people. While a half dozen can still milkrun, a single guy in a field gun, osti, il2, whatever can still chew them all up. When it gets to be 10, 11, 12 guys from a squad, and nearly as many from another squad... that's definitely a horde.
With regards to guys watching the map, I think we simply have less of that than we used to. Don't know if it's because everyone is too busy looking for the least defended place to attack, or if they just don't care to look for attackers, there just seems to be much less of that kind of cartoon vigilance, IMO. I don't think that particular aspect has changed due so much to lower numbers, as lower interest.