Well I don't see what's different now from earlier editions, just pick any high level old module and you will see a lot of high level guards/mooks. This has been a staple of D&D as long as I can remember.
I'd like to see an example of that in a Gygax 1E adventure.
One thing that was nice in the 1E DMG was tables for city guard/wilderness patrol groups with specific levels attached for soldiers vs. leaders (maxed out at around 8th level for army captains). That set a very nice baseline for what everyone could expect playing AD&D. It looks like that kind of thing is anti-4E-philosophy.
Personally I got highly aggravated when, playing under one DM in 3E, we walk into a random room and there's three 15th-level goblins.
