Mistermix did a good job describing how unorthodox a candidate Linda McMahon is. There’s a bunch of other female GOP candidates of this general sort out there too: Lowden and Angle in Nevada with their chicken bartering and barely coherent policy statements, respectively, and Carly Fiorina in California, with her crazy demon sheep ads, for example.
It’s hard to think of much precedent for this, other than Sarah Palin. The successful female Republican politicians that spring to mind are mostly moderate and professional: Christie Todd Whitman, Olympia Snowe, Susan Collins, Kay Bailey Hutchinson (less moderate but she’s pretty moderate for Texas).
I question the wisdom of the Bachmann-Palin strategy. Republicans do badly among women voters in general and can probably improve their standing with Whitman/Snowe/Collins type candidates. I can’t imagine demon sheep, chicken-bartering, and pro wrestling going over well with female swing voters. On the other hand, I suppose it’s possible that insane winger women frighten voters less than insane winger men do. (I realize that Fiorina is not an insane winger, but she is running as if she were one.)