I played this weekend too. Ran a battle for a village. It involved 7 PCs and the 10 NPCs on their side against the many, many more than that on the other side. Took 30+ rounds.
It took us about 2 hours.
It's style -- player style, GM style, the style of your interactions, etc. -- not the system(*) that will determine how long it takes to run any particular encounter.
(*) I'm willing to admit that CHAMPIONS(tm) combat may be an exception to this rule. :-)
-Dave Henry
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