I think what he is saying is that AC/DCs songs rock harder, and thus are still played at every sporting event.
AC/DC still plays to packed stadiums, not with an **unplugged** set, but still rocking out.
The last place I heard a Zep song, other than on the radio, was in a perfume commercial:
No one would argue that Zep is the more talented band.
BTW here is the original Muddy Water's 1962 version of "Whole Lotta Love" that Zep stole: