Dungeons are exactly the same but most of those people ask for things like tabards so that they can just chain run dungeons over and over again so they are done in a day or two.
You know what there is a thread in classic that illustrates exactly what happens when people can just burn through content.
Here you go.
And in case you don’t realize what it takes to get lvl 60 - 12-14 days played time for the fast levelers in my classic guild. That is averaging 10 hours a day since classic released less than a month ago.