Just like Sweet, Suzie Quatro or even T.rex to a certain extent. Basically, the british '70's glam-rock scene never truly crossed over to america (not that it needed to, Kiss and Alice Cooper held it down in the US with better records IMO-Marc Bolan/T.rex an obvious exception).

Basically, i doubt the regular american knows that it's a cover. For me, it was more ignorance since Slade actually were quite big in sweden...