Are some of the basic elements of medieval combat too weak in D&D?

[garyh]

Minions could still use shield wall or pike formation or attack the party with a ballista. Big guns vs big guns. You really have to break from 3e mindset of very few combatants.

If you use the standard of 5 PC's and then 20 minions to face them (5 enemies-worth of minions), does that really approach anything resembling a medieval scale of combat? I still would say no.