YEah Avengers just passed the X-men big time.
it also helped that Avengers have basically been dominating the X-books for the last century, where the X-books have kind of topped off and just branched off into several other books getting too convoluted.
Where as Avengers have basically been tied to all the big Events since 2006. And as far as films which reach a wider audience Avengers have surpassed X-men now.
X-men still has Avengers beat cartoon wise, but I'm guessing that won't last for long. Marvel really needs to get its act together with the X-men