I think my players, particularly my brother with his wizard, can appreciate some cannon fodder, but they would be awfully mad if it was all they fought. I toss a couple into most encounters, but they're usually not much more than 30% of the forces. When I add more, I make them VERY delicate. Hell, I've had my solos step on them or throw them if they get in their way. We usually have one or two large encounters, rather than several more small ones, though, in our play sessions, so if it was a "wandering monster" scenario in a dungeon, it would be a little different.
Minion recognition(Or lack thereof) did lead to a funny moment with a player, though.
*Rolls a fancy encounter power*"Aw right, I crit on the guy in the doorway!"
"It died."
"...wait, what?"
"It... You brought your axe down and-"
*laughing* "No, no, it died. Simple as that."
I made it up to him with his next kill, but that became a running joke, considering we usually add colorful descriptions to actions, from saying "You fingers scrape along the edge, and you force yourself up on the ledge, ready to keep on fighting", rather than "You made the jump", so my "It died." caught our group off guard.
So, long story short(too late), I might say the minions have lackluster gear, or that they "don't look particularly sturdy, but the murderous glare they've met your eyes with shows they don't intend to walk away, outmatched or not", things along those lines. I don't outright call them minions, I just contrast them with, say, the mighty Dragonborn backing up this wave of Kobolds.