Talk:Multiplane (aeronautics)

Misstatement in introduction?
The final sentence in the introduction reads "While triplane, quadruplane and tandem designs are relatively uncommon, aircraft with more than four sets of wings rarely occur - none have proven successful". Did the author intend to say that triplanes/quads/tandems are relatively _common_? Otherwise there's no distinction being made even though "While" implies one.

I'd revise it myself except that the quadruplane section shows that quads are not very common at all, so I really don't know what the author of that sentence intended.